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anonymous

The Most Intimate Portrait Yet of a Black Hole - The New York Times - 0 views

www.nytimes.com/...omy-messier-87-black-hole.html

shared by anonymous on 26 Mar 21 - No Cached
  • The Event Horizon Telescope collaboration, an international team of radio astronomers that has been staring down the throat of a giant black hole for years, on Wednesday published what it called the most intimate portrait yet of the forces that give rise to quasars
  • The black hole in question is a monster 6.5 billion times as massive as the sun, and lies in the center of an enormous elliptical galaxy, Messier 87, about 55 million light-years away in the constellation Virgo.
  • Now, seen through the radio equivalent of polarized sunglasses, the M87 black hole appears as a finely whiskered vortex, like the spinning fan blades of a jet engine, pumping matter into the black hole and energy outward into space.
  • ...11 more annotations...
  • “Now we can actually see the patterns of these fields in M87 and begin to study how the black hole is funneling material to its center,”
  • Janna Levin, an astrophysicist at Barnard College of Columbia University who studies black holes but was not part of the Event Horizon team, called the results “thrilling,” as they revealed details about how a black hole can create “a lethal, powerful, astronomical ray gun that extends thousands of light-years.”
  • The results were announced on Wednesday in two papers published in the Astrophysical Journal Letters by the Event Horizon Telescope Collaboration, and in a third paper, by Ciriaco Goddi of Radboud University in the Netherlands and a large international cast, that has been accepted by the same journal.
  • “The direction and intensity of the polarization in the image tells us about the magnetic fields near the event horizon of the black hole,” said Andrew Chael, an astrophysicist at Princeton University who is part of the Event Horizon team.
  • Black holes are bottomless pits in space-time, where gravity is so powerful that not even light can escape; whatever enters essentially disappears from the universe. The cosmos is littered with black holes.
  • In 2009, eager to explore the underlying mechanisms and to verify Einstein’s predictions about black holes, Dr. Doeleman and his colleagues formed the Event Horizon Telescope, an international collaboration that now comprises some 300 astronomers from 13 institutions.
  • Black holes were first “heard” colliding in 2015, by the Laser Interferometer Gravitational-Wave Observatory. Now they could be seen, as an inky portal of nothingness framed by a swirling doughnut of radiant gas in the center of the galaxy Messier 87.
  • It took another two years for researchers to produce the polarized images released on Wednesday.Jets and lobes of radio, X-ray and other forms of energy extend more than 100,000 light-years from the black hole in M87.
  • Most of that matter falls into the black hole, but some is pushed out, like toothpaste, by enormous pressures and magnetic fields. How all of this energy arises and is marshaled remains unknown to astronomers.
  • “The E.H.T. images also provide hints that the bright jet in M87 is actually powered from the rotational energy of the black hole, which twists the magnetic fields as it rotates,” said Michael Johnson another Event Horizon member from the Harvard-Smithsonian Center for Astrophysics.
  • Apparently it isn’t terribly hungry; the black hole is eating “a paltry” one-thousandth of the mass of the sun per year.“Yet it’s enough to launch powerful jets that stretch for thousands of light years, and it’s radiant enough for us to capture it with the E.H.T.,” he said.
Javier E

Free Black Thought: A Manifesto - Persuasion - 0 views

www.persuasion.community/...free-black-thought-a-manifesto

persuasion racism Critical Theory race Culture Politics epistemology perspective bias

shared by Javier E on 14 May 21 - No Cached
  • In a now-deleted tweet from May 22, 2020, Nikole Hannah-Jones, a Pulitzer Prize-winning reporter for The New York Times, opined, “There is a difference between being politically black and being racially black.”
  • Growing out of the Critical Race Theory (CRT) movement, a culture of censorship has taken root in many of our institutions.
  • The implication of Hannah-Jones’s tweet and candidate Biden’s quip seems to be that you can have African ancestry, dark skin, textured hair, and perhaps even some “culturally black” traits regarding tastes in food, music, and ways of moving through the world. But unless you hold the “correct” political beliefs and values, you are not authentically black.
  • ...48 more annotations...
  • CRT makes two basic observations: First, that bias and prejudice exist not just in the hearts and minds of individuals, but also in society’s social structures and systems.
  • second, that bias embedded in systems is frequently invisible to the dominant class but perfectly perceptible to its victims
  • This need is especially urgent given the ideological homogeneity of the “antiracist” outlook and efforts of elite institutions, including media, corporations, and an overwhelmingly progressive academia. For the arbiters of what it means to be black that dominate these institutions, there is a fairly narrowly prescribed “authentic” black narrative, black perspective, and black position on every issue that matters.
  • Both of these observations are true at least some of the time
  • The problem is that the second—sometimes referred to as “standpoint epistemology”—contends that only minorities have standing to articulate a view on race and racism.
  • In her book What Does It Mean to Be White?, Robin DiAngelo puts it this way: “Sometimes I am asked, ‘But what if the person of color is wrong and what they think is racism isn’t racism at all?’ To this I say that people of color are much more qualified than we are to make this determination. My not being able to see racism is unrelated to its reality.” Anyone who proffers an alternative perspective can be accused of “privilege.”
  • This insight goes a long way to explaining the current fetishization of experience, especially if it is (redundantly) “lived.” Black people from all walks of life find themselves deferred to by non-blacks
  • black people certainly don’t all “feel” or “experience” the same things. Nor do they all "experience" the same event in an identical way. Finally, even when their experiences are similar, they don’t all think about or interpret their experiences in the same way.
  • Given America’s history of racism, we do have a special obligation to listen closely when marginalized people talk about their experience: The victims of racism will indeed have insights that others cannot possibly glean on their own.
  • we must begin to attend in a serious way to heterodox black voices
  • The practical effects of the new antiracism are everywhere to be seen, but in few places more clearly than in our children’s schools
  • But I cannot agree that, in making space for marginalized voices, everyone else should defer to whatever ideological claims members of a minority group attach to their definition of racism.
  • it tends to go like this: Defer to my lived experience; my lived experience reveals that critical race theory is true; you, too, must abide by critical race theory.
  • First, insisting that large swaths of people keep quiet is not a sustainable moral undertaking
  • Calling on those deemed privileged to mute themselves permanently on issues of race and racism only engenders resentment.
  • When we hear the demand to “listen to black voices,” what is usually meant is “listen to the right black voices.”
  • Many non-black people have heard a certain construction of “the black voice” so often that they are perplexed by black people who don’t fit the familiar model.
  • Similarly, many activists are not in fact “pro-black”: they are pro a rather specific conception of “blackness” that is not necessarily endorsed by all black people.
  • There’s a difference between listening to someone’s experience and tying oneself to their entire worldview. Challenging someone’s viewpoint should not be taken as invalidating their feelings.
  • This is where our new website, Free Black Thought (FBT), seeks to intervene in the national conversation. FBT honors black individuals for their distinctive, diverse, and heterodox perspectives, and offers up for all to hear a polyphony, perhaps even a cacophony, of different and differing black voices.
  • Second, oppressed people, like all people, are sometimes wrong.
  • Lived experience, while important, is just one data point in understanding social reality. Being oppressed doesn’t give anyone a monopoly on wisdom, even about oppression. Indeed, our experience can bias our insight
  • Shelly Eversley’s The Real Negro suggests that in the latter half of the 20th century, the criteria of what constitutes “authentic” black experience moved from perceptible outward signs, like the fact of being restricted to segregated public spaces and speaking in a “black” dialect, to psychological, interior signs. In this new understanding, Eversley writes, “the ‘truth’ about race is felt, not performed, not seen.”
  • one might reasonably question what could be wrong with teaching children “antiracist” precepts. But the details here are full of devils.
  • Third, marginalized communities are diverse.
  • To take an example that could affect millions of students, the state of California has adopted a statewide Ethnic Studies Model Curriculum (ESMC) that reflects “antiracist” ideas. The ESMC’s content inadvertently confirms that contemporary antiracism is often not so much an extension of the civil rights movement but in certain respects a tacit abandonment of its ideals.
  • “The spectrum of thought amongst African Americans is and has always been much broader and multifarious than commonly perceived,” he writes. “Neglect of that fact has led to a homogenization that has tended to submerge African American individuality.”
  • It has thus been condemned as a “perversion of history” by Dr. Clarence Jones, MLK’s legal counsel, advisor, speechwriter, and Scholar in Residence at the Martin Luther King, Jr. Institute at Stanford University:
  • Today, Black people are no less diverse in their political views than they’ve been through the ages.
  • Who alone speaks for a marginalized people? I, for one, will listen to anyone willing to talk with me.
  • Fourth, oppressed people around the world hold claims that directly contradict those of other oppressed people.
  • If you agree that one oppressed group has standing to define reality, it’s hard to argue that all oppressed people around the world don’t have similar standing to define their narratives of oppression, some of which conflict with each other.
  • Finally, some schools are adopting antiracist ideas of the sort espoused by Ibram X. Kendi, according to whom, if metrics such as tests and grades reveal disparities in achievement, the project of measuring achievement must itself be racist.
  • Fifth, once you allow someone else to define reality for you, you never know where it will take you. You’ve now outsourced your analysis to a third party, who may down the line make absurd statements or engage in untenable behavior that you now feel compelled to defend
  • Or consider the third-grade students at R.I. Meyerholz Elementary School in Cupertino, California
  • Essentialist thinking about race has also gained ground in some schools. For example, in one elite school, students “are pressured to conform their opinions to those broadly associated with their race and gender and to minimize or dismiss individual experiences that don’t match those assumptions.” These students report feeling that “they must never challenge any of the premises of [the school’s] ‘antiracist’ teachings.”
  • In contrast, the non-white students were taught that they were “folx (sic) who do not benefit from their social identities,” and “have little to no privilege and power.”
  • We will never effectively address our problems, however, if one set of voices claims unique insight and seeks to shut out the rest from the discussion.
  • Or take New York City’s public school system, one of the largest educators of non-white children in America. In an effort to root out “implicit bias,” former Schools Chancellor Richard Carranza had his administrators trained in the dangers of “white supremacy culture.”
  • A slide from a training presentation listed “perfectionism,” “individualism,” “objectivity” and “worship of the written word” as white supremacist cultural traits to be “dismantled,”
  • The children with “white” in their identity map were taught that they were part of the “dominant culture” which has been “created and maintained…to hold power and stay in power.” They were also taught that they had “privilege” and that “those with privilege have power over others.
  • Parents are justifiably worried about such innovations. What black parent wants her child to hear that grading or math are “racist” as a substitute for objective assessment and real learning? What black parent wants her child told she shouldn’t worry about working hard, thinking objectively, or taking a deep interest in reading and writing because these things are not authentically black?
  • Clearly, our children’s prospects for success depend on the public being able to have an honest and free-ranging discussion about this new antiracism and its utilization in schools. Even if some black people have adopted its tenets, many more, perhaps most, hold complex perspectives that draw from a constellation of rather different ideologies.
  • So let’s listen to what some heterodox black people have to say about the new antiracism in our schools.
  • Coleman Hughes, a fellow at the Manhattan Institute, points to a self-defeating feature of Kendi-inspired grading and testing reforms: If we reject high academic standards for black children, they are unlikely to rise to “those same rejected standards” and racial disparity is unlikely to decrease
  • Chloé Valdary, the founder of Theory of Enchantment, worries that antiracism may “reinforce a shallow dogma of racial essentialism by describing black and white people in generalizing ways” and discourage “fellowship among peers of different races.”
  • We hope it’s obvious that the point we’re trying to make is not that everyone should accept uncritically everything these heterodox black thinkers say. Our point in composing this essay is that we all desperately need to hear what these thinkers say so we can have a genuine conversation
  • We promote no particular politics or agenda beyond a desire to offer a wide range of alternatives to the predictable fare emanating from elite mainstream outlets. At FBT, Marxists rub shoulders with laissez-faire libertarians. We have no desire to adjudicate who is “authentically black” or whom to prefer.
Javier E

Who Decides What's Racist? - Persuasion - 0 views

www.persuasion.community/...who-decides-whats-racist

Culture Politics

shared by Javier E on 14 May 21 - No Cached
  • Growing out of the Critical Race Theory (CRT) movement, a culture of censorship has taken root in many of our institutions.
  • CRT makes two basic observations: First, that bias and prejudice exist not just in the hearts and minds of individuals, but also in society’s social structures and systems.
  • second, that bias embedded in systems is frequently invisible to the dominant class but perfectly perceptible to its victims
  • ...48 more annotations...
  • Both of these observations are true at least some of the time
  • The problem is that the second—sometimes referred to as “standpoint epistemology”—contends that only minorities have standing to articulate a view on race and racism.
  • In her book What Does It Mean to Be White?, Robin DiAngelo puts it this way: “Sometimes I am asked, ‘But what if the person of color is wrong and what they think is racism isn’t racism at all?’ To this I say that people of color are much more qualified than we are to make this determination. My not being able to see racism is unrelated to its reality.” Anyone who proffers an alternative perspective can be accused of “privilege.”
  • Given America’s history of racism, we do have a special obligation to listen closely when marginalized people talk about their experience: The victims of racism will indeed have insights that others cannot possibly glean on their own.
  • Calling on those deemed privileged to mute themselves permanently on issues of race and racism only engenders resentment.
  • it tends to go like this: Defer to my lived experience; my lived experience reveals that critical race theory is true; you, too, must abide by critical race theory.
  • First, insisting that large swaths of people keep quiet is not a sustainable moral undertaking
  • There’s a difference between listening to someone’s experience and tying oneself to their entire worldview. Challenging someone’s viewpoint should not be taken as invalidating their feelings.
  • We will never effectively address our problems, however, if one set of voices claims unique insight and seeks to shut out the rest from the discussion.
  • Second, oppressed people, like all people, are sometimes wrong.
  • Lived experience, while important, is just one data point in understanding social reality. Being oppressed doesn’t give anyone a monopoly on wisdom, even about oppression. Indeed, our experience can bias our insight
  • Third, marginalized communities are diverse.
  • “The spectrum of thought amongst African Americans is and has always been much broader and multifarious than commonly perceived,” he writes. “Neglect of that fact has led to a homogenization that has tended to submerge African American individuality.”
  • Today, Black people are no less diverse in their political views than they’ve been through the ages.
  • Who alone speaks for a marginalized people? I, for one, will listen to anyone willing to talk with me.
  • Fourth, oppressed people around the world hold claims that directly contradict those of other oppressed people.
  • If you agree that one oppressed group has standing to define reality, it’s hard to argue that all oppressed people around the world don’t have similar standing to define their narratives of oppression, some of which conflict with each other.
  • Fifth, once you allow someone else to define reality for you, you never know where it will take you. You’ve now outsourced your analysis to a third party, who may down the line make absurd statements or engage in untenable behavior that you now feel compelled to defend
  • But I cannot agree that, in making space for marginalized voices, everyone else should defer to whatever ideological claims members of a minority group attach to their definition of racism.
  • The implication of Hannah-Jones’s tweet and candidate Biden’s quip seems to be that you can have African ancestry, dark skin, textured hair, and perhaps even some “culturally black” traits regarding tastes in food, music, and ways of moving through the world. But unless you hold the “correct” political beliefs and values, you are not authentically black.
  • In a now-deleted tweet from May 22, 2020, Nikole Hannah-Jones, a Pulitzer Prize-winning reporter for The New York Times, opined, “There is a difference between being politically black and being racially black.”
  • Shelly Eversley’s The Real Negro suggests that in the latter half of the 20th century, the criteria of what constitutes “authentic” black experience moved from perceptible outward signs, like the fact of being restricted to segregated public spaces and speaking in a “black” dialect, to psychological, interior signs. In this new understanding, Eversley writes, “the ‘truth’ about race is felt, not performed, not seen.”
  • This insight goes a long way to explaining the current fetishization of experience, especially if it is (redundantly) “lived.” Black people from all walks of life find themselves deferred to by non-blacks
  • black people certainly don’t all “feel” or “experience” the same things. Nor do they all "experience" the same event in an identical way. Finally, even when their experiences are similar, they don’t all think about or interpret their experiences in the same way.
  • we must begin to attend in a serious way to heterodox black voices
  • This need is especially urgent given the ideological homogeneity of the “antiracist” outlook and efforts of elite institutions, including media, corporations, and an overwhelmingly progressive academia. For the arbiters of what it means to be black that dominate these institutions, there is a fairly narrowly prescribed “authentic” black narrative, black perspective, and black position on every issue that matters.
  • When we hear the demand to “listen to black voices,” what is usually meant is “listen to the right black voices.”
  • Many non-black people have heard a certain construction of “the black voice” so often that they are perplexed by black people who don’t fit the familiar model.
  • Similarly, many activists are not in fact “pro-black”: they are pro a rather specific conception of “blackness” that is not necessarily endorsed by all black people.
  • This is where our new website, Free Black Thought (FBT), seeks to intervene in the national conversation. FBT honors black individuals for their distinctive, diverse, and heterodox perspectives, and offers up for all to hear a polyphony, perhaps even a cacophony, of different and differing black voices.
  • The practical effects of the new antiracism are everywhere to be seen, but in few places more clearly than in our children’s schools
  • one might reasonably question what could be wrong with teaching children “antiracist” precepts. But the details here are full of devils.
  • To take an example that could affect millions of students, the state of California has adopted a statewide Ethnic Studies Model Curriculum (ESMC) that reflects “antiracist” ideas. The ESMC’s content inadvertently confirms that contemporary antiracism is often not so much an extension of the civil rights movement but in certain respects a tacit abandonment of its ideals.
  • It has thus been condemned as a “perversion of history” by Dr. Clarence Jones, MLK’s legal counsel, advisor, speechwriter, and Scholar in Residence at the Martin Luther King, Jr. Institute at Stanford University:
  • Essentialist thinking about race has also gained ground in some schools. For example, in one elite school, students “are pressured to conform their opinions to those broadly associated with their race and gender and to minimize or dismiss individual experiences that don’t match those assumptions.” These students report feeling that “they must never challenge any of the premises of [the school’s] ‘antiracist’ teachings.”
  • In contrast, the non-white students were taught that they were “folx (sic) who do not benefit from their social identities,” and “have little to no privilege and power.”
  • The children with “white” in their identity map were taught that they were part of the “dominant culture” which has been “created and maintained…to hold power and stay in power.” They were also taught that they had “privilege” and that “those with privilege have power over others.
  • Or consider the third-grade students at R.I. Meyerholz Elementary School in Cupertino, California
  • Or take New York City’s public school system, one of the largest educators of non-white children in America. In an effort to root out “implicit bias,” former Schools Chancellor Richard Carranza had his administrators trained in the dangers of “white supremacy culture.”
  • A slide from a training presentation listed “perfectionism,” “individualism,” “objectivity” and “worship of the written word” as white supremacist cultural traits to be “dismantled,”
  • Finally, some schools are adopting antiracist ideas of the sort espoused by Ibram X. Kendi, according to whom, if metrics such as tests and grades reveal disparities in achievement, the project of measuring achievement must itself be racist.
  • Parents are justifiably worried about such innovations. What black parent wants her child to hear that grading or math are “racist” as a substitute for objective assessment and real learning? What black parent wants her child told she shouldn’t worry about working hard, thinking objectively, or taking a deep interest in reading and writing because these things are not authentically black?
  • Clearly, our children’s prospects for success depend on the public being able to have an honest and free-ranging discussion about this new antiracism and its utilization in schools. Even if some black people have adopted its tenets, many more, perhaps most, hold complex perspectives that draw from a constellation of rather different ideologies.
  • So let’s listen to what some heterodox black people have to say about the new antiracism in our schools.
  • Coleman Hughes, a fellow at the Manhattan Institute, points to a self-defeating feature of Kendi-inspired grading and testing reforms: If we reject high academic standards for black children, they are unlikely to rise to “those same rejected standards” and racial disparity is unlikely to decrease
  • Chloé Valdary, the founder of Theory of Enchantment, worries that antiracism may “reinforce a shallow dogma of racial essentialism by describing black and white people in generalizing ways” and discourage “fellowship among peers of different races.”
  • We hope it’s obvious that the point we’re trying to make is not that everyone should accept uncritically everything these heterodox black thinkers say. Our point in composing this essay is that we all desperately need to hear what these thinkers say so we can have a genuine conversation
  • We promote no particular politics or agenda beyond a desire to offer a wide range of alternatives to the predictable fare emanating from elite mainstream outlets. At FBT, Marxists rub shoulders with laissez-faire libertarians. We have no desire to adjudicate who is “authentically black” or whom to prefer.
Javier E

The Cosmos Is Thrumming With Gravitational Waves, Astronomers Find - The New York Times - 0 views

www.nytimes.com/...vitational-waves-nanograv.html

cosmos waves gravity

shared by Javier E on 29 Jun 23 - No Cached
  • an international consortium of research collaborations revealed compelling evidence for the existence of a low-pitch hum of gravitational waves reverberating across the universe.
  • The scientists strongly suspect that these gravitational waves are the collective echo of pairs of supermassive black holes — thousands of them, some as massive as a billion suns, sitting at the hearts of ancient galaxies up to 10 billion light-years away — as they slowly merge and generate ripples in space-time.
  • Each pair of supermassive black holes is generating a different note, Dr. Siemens said, “and what we’re receiving is the sum of all those signals at once.”
  • ...12 more annotations...
  • the results were consistent with Albert Einstein’s theory of general relativity, which describes how matter and energy warp space-time to create what we call gravity. As more data is gathered, this cosmic hum could help researchers understand how the universe achieved its current structure and perhaps reveal exotic types of matter that may have existed shortly after the Big Bang 13.7 billion years ago.
  • “The gravitational-wave background was always going to be the loudest, most obvious thing to find,” said Chiara Mingarelli, an astrophysicist at Yale University and a member of NANOGrav, which is funded by the National Science Foundation. “This is really just the beginning of a whole new way to observe the universe.”
  • Gravitational waves are created by any object that spins, such as the rotating remnants of stellar corpses, orbiting black holes or even two people “doing a do-si-do,” Dr. Mingarelli said. But unlike other types of waves, these ripples stretch and squeeze the very fabric of space-time, warping the distances between any celestial objects they pass by.
  • Gravitational waves were first detected in 2016 as audible chirps by the Laser Interferometer Gravitational-Wave Observatory, or LIGO, collaboration; the breakthrough solidified Einstein’s theory of general relativity as an accurate model of the universe and earned the project’s founders the Nobel Prize in Physics in 2017. But LIGO’s signals were mostly in the frequency range of a few hundred hertz, and were created by individual pairs of black holes or neutron stars that were 10 to 100 times as massive as our sun.
  • In contrast, the researchers involved in this work were looking for a collective hum at much lower frequencies — one-billionth of one hertz, far below the audible range — emanating from everywhere all at once.
  • If the signal does arise from orbiting pairs of supermassive black holes, studying the gravitational-wave background will shed light on the evolutionary history of these systems and the galaxies surrounding them. But the gravitational-wave background could also be coming from something else, like hypothetical cracks in space-time known as cosmic strings.
  • Or it could be a relic of the Big Bang, akin to the cosmic microwave background, which led to fundamental discoveries about the structure of the universe to within 400,000 years of its beginning. The gravitational-wave background would be an even better primordial probe, Dr. Mingarelli said, because it would have been emitted almost instantaneously.
  • To detect the gravitational-wave background, researchers analyzed the lighthouse-like nature of pulsars. These objects act like cosmic clocks, emitting beams of radio waves that can be periodically measured on Earth.
  • Einstein’s theory of general relativity predicts that as gravitational waves sweep past pulsars, they should expand and shrink the distance between these objects and Earth, changing the time it takes for the radio signals to arrive at observers. And if the gravitational-wave background is indeed everywhere, pulsars across the universe should be affected in a correlated way.
  • The findings carry a confidence level in the range of 3.5- to 4-sigma, just shy of the 5-sigma standard generally expected by physicists to claim a smoking-gun discovery. That means the odds of seeing a result like this randomly are about 1 in 1,000 years, Dr. Mingarelli said. “That’s good enough for me, but other people want once in a million years,” she said. “We’ll get there eventually.”
  • f the ripples originated with the Big Bang, they might instead provide insight into the expansion of the cosmos or the nature of dark matter — the invisible glue scientists think holds the universe together — and perhaps even reveal new particles or forces that once existed.
  • a few more years may be needed to confirm the source of the gravitational-wave background. Researchers have already begun using their data to piece together maps of the universe and to look for intense, nearby regions of gravitational-wave signals indicative of an individual supermassive black hole binary.
rachelramirez

Really, really big black hole detected - CNN.com - 0 views

www.cnn.com/...index.html

black hole cnn Royal Astronomical Society

shared by rachelramirez on 29 Sep 15 - No Cached
  • Black hole is 30 times bigger than expected
  • The galaxy, with the very clunky name of SAGE0536AGN, was discovered with NASA's Spitzer Space Telescope. Scientists think it's about 9 billion years old.
  • The data indicated the black hole is 30 times larger than expected for this size of galaxy, according to a press release from the Royal Astronomical Society.
  • ...1 more annotation...
  • Scientists aren't sure whether SAGE0536AGN is just a fluke or whether they've found a new class of galaxies.
malonema1

GOP senator: Trump did not make 's---hole' comment | TheHill - 0 views

thehill.com/...-did-not-make-shithole-comment

Trump US culture

shared by malonema1 on 14 Jan 18 - No Cached
  • I’m telling you he did not use that word, George. And I’m telling you it’s a gross misrepresentation. How many times do you want me to say that?” Perdue said after host George Stephanopoulos pressed him for an answer.Perdue was one of several lawmakers participating in a meeting with Trump last week when the president reportedly referred to immigrants from African nations, El Salvador and Haiti as coming from "shithole countries."
  • Trump allies see 's***hole' controversy as overblownTrump allies see 's***hole' controversy as overblownPlay VideoPlayMute0:00/0:43Loaded: 0%0:00Progress: 0%Stream TypeLIVE-0:43 SharePlayback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedCaptions
  • "Following comments by the President, I said my piece directly to him yesterday. The President and all those attending the meeting know what I said and how I feel. I've always believed that America is an idea, not defined by its people but by its ideals," Graham said. 
andrespardo

African Americans bear the brunt of Covid-19's economic impact | US news | The Guardian - 0 views

www.theguardian.com/...yment-covid-19-economic-impact

inernational pandemic coronavirus crisis economics

shared by andrespardo on 28 Apr 20 - No Cached
  • African Americans bear the brunt of Covid-19's economic impact
  • Donald Trump once again praised his job creation record. “Black people right now are having the best, statistically, the best numbers that you’ve ever had, and it’s really an honor,” he said. “Nobody has done more for black people than I have. Nobody has done more.”
  • That was 27 February and Trump was also still claiming he had done an “incredible job” with the looming coronavirus pandemic. Now the virus has led 26 million Americans to file for unemployment. While the US Bureau of Labor Statistics will not release unemployment figures broken down by race until the beginning of next month, economists are certain that black Americans are suffering the brunt of Covid-19’s economic impact and will probably suffer the most dramatic consequences of the looming recession.
  • ...15 more annotations...
  • 3.5%, a 50-year-low, the black unemployment rate was 5.8%. The white unemployment rate was 3.1%.
  • “Whatever is being projected for the national unemployment rate, in most instances, we expect to see something close to twice that for black Americans.”
  • For Yolanda Murray of Detroit, Michigan, not having savings meant weeks of panic trying to figure out how she was going to pay the bills that came on 1 April after she was furloughed from her job at a hotel.
  • last hired, first fired” phenomenon dramatically affects black Americans more than any other group in the US due to the country’s history of racism and segregation of black Americans in the work sector.
  • Working in these fields leads to lower wages – black Americans have the lowest median wage of any racial group in the US – and the jobs are often seen as the most expendable during an economic downturn.
  • Even with a low unemployment rate, wage growth for low-wage workers, especially for black workers, has been slow. Black Americans have seen the slowest wage growth compared with other groups of Americans, reaching a growth rate that was four times slower at certain wage distribution levels, according to a 2018 Economic Policy Institute report.
  • The reason why African Americans bear the brunt of downturns more is that when firing decisions start to occur the least educated and those with the least experience tend to be let go first. There is also continued discrimination in the workplace,” Rodgers said.
  • t’s like how am I going to maintain all of this?” Murray said. Weeks after she filed her application for unemployment insurance, payments started coming in and Murray was able to pay her bills again.
  • Murray and her unionized co-workers spent 28 days striking for higher wages and better healthcare. At the time, workers at the hotel had not had wage rises since before the last recession, and healthcare costs were so expensive that Murray could only afford to cover herself, leaving her two children out of her plan.
  • Trump’s repeated claims that he has been the best president for African Americans was repeatedly pegged to falling unemployment numbers. But those numbers only tell a partial story, as work by Rodgers and others has shown. Black families are especially vulnerable to economic downturns because they lack the savings that can act as a buffer against unexpected layoffs or lost wages. And during the last recovery they lost ground against their white peers.
  • compared with 9%, respectively. And the black homeownership rate is the lowest of any racial group in the US and has consistently been about 30% lower than the white homeownership rate over the years, even as the economy was getting stronger.
  • “Wealth allows you to respond to that unexpected health emergency, that broken hole in the tire you have to replace. It also allows you to buy a home, put your kids through school,” said Danyelle Solomon, vice-president of the race and ethnicity program at the Center for American Progress.
  • Experts agree that being poor has costly effects on a person’s health: for adults living in extreme poverty, being poor can cost up to 15 years of life expectancy.
  • ave seen higher death rates due to Covid-19 compared with any other group in the US. Black Americans made up 25% of deaths from Covid-19 in the US though they make up a little under 13% of the US population.
  • “National emergencies, pandemics, epidemics, what they do is they spotlight inequality,” Solomon said. “What we see in Covid-19 is no different. It’s highlighting racial disparities at every single level that have been with our society for a very long time.”
brookegoodman

8 in 10 black voters say Trump is racist, new poll shows - CNNPolitics - 0 views

www.cnn.com/...index.html

trump culture politics US

shared by brookegoodman on 19 Jan 20 - No Cached
  • The survey, released Friday, also finds that nine in 10 black Americans say they disapprove of Trump's job performance.
  • The black unemployment rate is at a record low at 5.5%, which Trump has frequently touted. But 77% of those polled say Trump deserves only some or hardly any credit for the American American unemployment rate.
  • Sixty-five percent of the black Americans polled feel it's a "bad time" to be a black person in America. At the same time, 77% of black Americans responded that it's a "good time" to be a white person in America.
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  • Trump has roundly denied accusations of racism. As President, he's faced blistering criticism over his public and private statements, like in 2017, when he blamed "both sides" after violence sparked by a neo-Nazi rally in Charlottesville, Virginia. He also privately referred to some African nations as "s***hole countries" and lambasted the protests led overwhelmingly by black NFL players. Last year, the US House of Representatives voted to condemn the President's comments when he told four congresswoman of color to "go back" to where they came from.
  • This Washington Post-Ipsos poll was conducted online January 2-8, 2020 among a random national sample of 1,088 non-Hispanic black adults age 18 and over.
Javier E

What Oppenheimer really knew about an atomic bomb ending the world - The Washington Post - 0 views

www.washingtonpost.com/...oject-history-atomic-bomb-test

world atom bomb end-of-the-world catastrophe physics quantum

shared by Javier E on 28 Jul 23 - No Cached
  • In a chilling, existential, bizarrely comic moment, the new movie “Oppenheimer” revives an old question: Did Manhattan Project scientists think there was even a minute possibility that detonating the first atomic bomb on the remote plains of New Mexico could destroy the world?
  • physicists knew it wouldn’t, long before the Trinity test on July 16, 1945, at the Alamogordo Bombing Range, about 210 miles south of the secret Los Alamos, N.M., laboratory.
  • “This thing has been blown out of proportion over the years,” said Richard Rhodes, author of the Pulitzer Prize-winning book “The Making of the Atomic Bomb.” The question on the scientists’ minds before the test, he said, “wasn’t, ‘Is it going to blow up the world?’ It was, ‘Is it going to work at all?’”
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  • In the movie, one scene has J. Robert Oppenheimer, director of the laboratory, seeking to reassure his boss, Gen. Leslie Groves, on the eve of the test. Upon investigation, Oppenheimer tells him, physicists have concluded that the chances the test detonation will destroy the world are “near zero.” Realizing the news has alarmed, not reassured, the general, Oppenheimer asks, “What do you want from theory alone?”“Zero would be nice,” the general replies.
  • no physicists or historians interviewed for this story recalled coming across any mention of such a conversation between Oppenheimer and the general in the historical record.
  • Still, the discussions and calculations persisted long after the Trinity test. In 1946, three Manhattan project scientists, including Teller, who would later become known as the father of the hydrogen bomb, wrote a report concluding that the explosive force of the first atomic bomb wasn’t even close to what would be required to trigger a planet-destroying chain reaction in air. The report was not declassified until 1973.
  • At a conference in the summer of 1942, almost a full year before Los Alamos opened, physicist Edward Teller raised the possibility of atomic bombs igniting Earth’s oceans or atmosphere. According to Rhodes’s account, Hans Bethe, who headed the theoretical division at Los Alamos, “didn’t believe it from the first minute” but nonetheless performed the calculations convincing the other physicists that such a disaster was not a reasonable possibility.
  • “I don’t think any physicists seriously worried about it,” said John Preskill, a professor of theoretical physics at California Institute of Technology.
  • “Did the actual exchange happen at that moment? No, I don’t think so,” said Alex Wellerstein, an associate professor at Stevens Institute of Technology in Hoboken, N.J., and author of the 2021 book, “Restricted Data: The History of Nuclear Secrecy in the United States.”“But were there discussions like that? I believe so,” he added.
  • A 1979 study by scientists at the University of California’s Lawrence Livermore Laboratory examined the question of whether a nuclear explosion might trigger a runaway reaction in the atmosphere or oceans. In page after page of mathematical equations, the scientists described a complex set of factors that made atmospheric ignition effectively impossible.
  • As outlandish as the notion was to many scientists, the nuclear research organization CERN felt obliged to deal with the fear, noting on its website that “some theories suggest that the formation of tiny ‘quantum’ black holes may be possible. The observation of such an event would be thrilling in terms of our understanding of the Universe; and would be perfectly safe.”
  • Dudley’s essay also recounted a story that on the day of the test, “as zero hour approached” Gen. Groves was annoyed to find Manhattan Project physicist and Nobel Prize winner Enrico Fermi making bets with colleagues about whether the bomb would ignite the atmosphere, “and, if so, whether it would destroy only New Mexico ― or the entire world.” (Some experts have suggested Fermi’s actions may have been more of a joke, or an example of gallows humor.)
  • Fascination with this doomsday scenario may stem, at least in part, from a misunderstanding of what physicists mean when they say “near zero.” The branch of physics known as quantum mechanics, which deals with matter and light at the atomic and subatomic scale, does not rule out any possibilities.
  • For example, if a boy tosses a rubber ball at a brick wall, there is an exceedingly remote — but still valid — possibility that instead of watching the ball bounce back, he could see it pass through the wall.
  • Aditi Verma, an assistant professor of nuclear engineering and radiological sciences at the University of Michigan, put it this way: “What a physicist means by ‘near zero’ would be zero to an engineer.”
  • In the 2000s, scientists encountered a similar problem of terminology as they prepared to generate high-speed particle collisions at the Large Hadron Collider in Geneva. Talk surfaced that the activity might generate a black hole that would devour Earth.
  • Probably the easiest to grasp is the fact that, even under the harshest scenarios, far more energy would be lost in the explosion than gained, wiping out any chance to sustain a chain reaction.
  • In other words, any black hole created by the collider would be far too small to pose any risk to the planet.Scientists say such disaster scenarios are sometimes the price of crossing new thresholds of discovery.
  • “You don’t often talk in certainties,” he said. “You talk in probabilities. If you haven’t done the experiment, you are hesitant to say ‘This is impossible. It will never happen.’ … It was good to think it through.”
  • Rhodes added that he hopes the “Oppenheimer” movie will not lead people to doubt the scientists on the Manhattan Project.“They knew what they were doing,” he said. “They were not feeling around in the dark.”
Javier E

Opinion | A physicist reacts to the gravitational waves discovery - The Washington Post - 0 views

www.washingtonpost.com/...tional-waves-new-view-universe

waves gravity astronomy cosmos

shared by Javier E on 07 Jul 23 - No Cached
  • a gravitational wave? That’s a distortion of space-time itself — a stretching and squeezing of the fabric of reality, a wave of deformation tearing through the cosmos, warping everything in its path. The monstrous denizens of the intergalactic deep reveal themselves not through the light they emit but by how they stir the space-time we share. When a gravitational wave moves through you, you are, for a moment, a different shape.
  • It’s a tiny effect, of course. The first gravitational waves detected in 2015 — by the Laser Interferometer Gravitational-Wave Observatory (LIGO) facilities in Livingston, La., and Hanford, Wash. — were triggered by black holes colliding a billion light-years from Earth and changed the length of the four-kilometer-long detectors by less than one-thousandth the width of a single proton.
  • Lying in bed on the night I heard about this breakthrough, I thought about the inescapable ripples in space altering me on a subatomic level. I thought I would never again feel I was on truly solid ground.
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  • In June, for the first time, astronomers revealed they had picked up traces of a background hum of low-frequency gravitational waves. It was embedded in 15 years of data from naturally occurring cosmic metronomes across the galaxy.
  • That’s why astronomers had to use the Milky Way itself as a makeshift observatory.
  • The final orbits of paired supermassive black holes can take years or decades while their gravitational waves stretch out across light-years. It’s not possible with current technology to build a detector that large, sensitive to waves with such low frequencies.
  • These metronomes, called millisecond pulsars, are the spinning remnants of dead massive stars. They sweep beams of radio waves with every rotation, hundreds per second — and keep near- perfect time. Tiny discrepancies might be because of individual stellar idiosyncrasies or could be a sign that gravitational waves have changed the distance each pulse travels on its way to us. By monitoring dozens of pulsars, astronomers hunt for correlations in timing errors that are a smoking gun of passing gravitational waves.
  • it is not entirely clear where the hum comes from, though it looks very much like what we expect from the combination of gravitational waves generated by all the supermassive black hole collisions across the cosmos. If it is, it’s a first step toward a whole new way of seeing the universe that will give us fantastic insights into the formation and growth of galaxies.
  • The hum could yet be something else entirely. It might be the quake from a violent event in the early universe, such as cosmic inflation — the spectacular expansion of space we think happened during the Big Bang. Another possible source is the vibrations of cosmic strings, hypothetical webs of energy that stretch across the cosmos.
Javier E

Toxic Political Culture Has Even Some Slovaks Calling Country 'a Black Hole.' - The New... - 0 views

www.nytimes.com/...vakia-politics-black-hole.html

slovakia authoritarian attitudes west liberal democracy violence politics history crisis culture

shared by Javier E on 20 May 24 - No Cached
  • Of all the countries in Central and Eastern Europe that shook off communist rule in 1989, Slovakia has the highest proportion of citizens who view liberal democracy as a threat to their identity and values — 43 percent compared with 15 percent in the neighboring Czech Republic
  • Support for Russia has declined sharply since the start of the full-scale invasion of Ukraine in 2022, but 27 percent of Slovaks see it as key strategic partner, the highest level in the region.
  • many of its people — particularly those living outside big cities — feel left behind and resentful, Mr. Meseznikov said, and are “more vulnerable than elsewhere to conspiracy theories and narratives that liberal democracy is a menace.”
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  • The picture is much the same in many other formerly communist countrie
  • Slovakia’s politics are particularly poisonous, swamped by wild conspiracy theories and bile.
  • The foundations of this were laid in the 1990s when Mr. Meciar formed what is still one of the country’s two main political blocs: an alliance of right-wing nationalists, business cronies and anti-establishment leftists. All thrived on denouncing their centrist and liberal opponents as enemies willing to sell out the country’s interests to the West
  • “Meciar was a pioneer,” he said. “He was a typical representative of national populism with an authoritarian approach, and so is Fico.”
  • On the day Mr. Fico was shot, Parliament was meeting to endorse an overhaul of public television to purge what his governing party views as unfair bias in favor of political opponents, a reprise of efforts in the 1990s by Mr. Meciar to mute media critics.
  • The legislation was part of a raft of measures that the European Commission in February said risked doing “irreparable damage” to the rule of law. These include measures to limit corruption investigations and impose what critics denounced as Russian-style restrictions on nongovernmental organizations. The government opposes military aid to Ukraine and L.G.B.T.Q. rights, is often at odds with the European Union and, like Mr. Orban, favors friendly relations with Vladimir V. Putin’s Russia.
  • In the run-up to the election last September that returned Mr. Fico, a fixture of Slovak politics for more than two decades, to power, he and his allies took an increasingly hostile stance toward the United States and Ukraine, combined with sympathetic words for Russia.
  • Their statements often recalled a remark by Mr. Meciar, who, resisting demands in the 1990s that he must change his ways if Slovakia wanted to join the European Union, held up Russia as an alternative haven: “if they don’t want us in the West, we’ll go East.”
  • But, he added, “the frames that the society and its elites use to interpret the conflict remain the same: a choice between a Western path and being something of a bridge between the East and the West, as well as a choice between liberal democracy and illiberal, authoritarian government.”
  • Andrej Danko, the leader of the party, which is now part of the new coalition government formed by Mr. Fico after the September election, said that the attempt to assassinate Mr. Fico represented the “start of a political war” between the country’s two opposing camps.
  • Iveta Radicova, a sociologist opposed to Mr. Fico who is a former prime minister, said Slovakia’s woes were part of a wider crisis with roots that extend far beyond its early stumbles under Mr. Meciar.
  • “Many democracies are headed toward the black hole,” as countries from Hungary in the East to the Netherlands in the West succumb to the appeal of national populism, she said. “This shift is happening everywhere.”
Javier E

Down the 1619 Project's Memory Hole - Quillette - 0 views

quillette.com/...-the-1619-projects-memory-hole

1619 NYT history politics culture US American idea

shared by Javier E on 21 Sep 20 - No Cached
  • The history of the American Revolution isn’t the only thing the New York Times is revising through its 1619 Project. The “paper of record” has also taken to quietly altering the published text of the project itself after one of its claims came under intense criticism.
  • The original opening text stated: The 1619 project is a major initiative from The New York Times observing the 400th anniversary of the beginning of American slavery. It aims to reframe the country’s history, understanding 1619 as our true founding, and placing the consequences of slavery and the contributions of black Americans at the very center of our national narrative. [emphasis added]
  • For several months after the 1619 Project first launched, its creator and organizer Nikole Hannah-Jones doubled down on the claim. “I argue that 1619 is our true founding,” she tweeted the week after the project launched
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  • The passage, and in particular its description of the year 1619 as “our true founding,” quickly became a flashpoint for controversy around the project. Critics on both the Left and Right took issue with the paper’s declared intention of displacing 1776 with the alternative date—a point that was also emphasized in the magazine feature’s graphics, showing the date of American independence crossed out and replaced by the date of the first slave ship’s arrival in Jamestown, Virginia.
  • Rather than address this controversy directly, the Times—it now appears—decided to send it down the memory hole—the euphemized term for selectively editing inconvenient passages out of old newspaper reports in George Orwell’s dystopian novel 1984
  • Other details of the project soon came under scrutiny, revealing both errors of fact and dubious interpretations of evidence in other essays, such as Matthew Desmond’s 1619 Project piece attempting to connect American capitalism with slavery.
  • Finally back in March, a historian who the Times recruited to fact-check Hannah-Jones’s essay revealed that she had warned the paper against publishing its claims about the motives of the American Revolution on account of their weak evidence. The 1619 Project’s editors ignored the advice.
  • the passage came to symbolize the Times’s blurring of historical analysis with editorial hyperbole. The announced intention of reframing the country’s origin date struck many readers across the political spectrum as an implicit repudiation of the American revolution and its underlying principles.
  • But something changed as the historical controversies around the 1619 Project intensified in late 2019 and early 2020. A group of five distinguished historians took issue with Hannah-Jones’s lead essay, focusing on its historically unsupported claim that protecting slavery was a primary motive of the American revolutionaries when they broke away from Britain in 1776
  • Without announcement or correction, the newspaper quietly edited out the offending passage such that it now reads:
  • The 1619 Project is an ongoing initiative from The New York Times Magazine that began in August 2019, the 400th anniversary of the beginning of American slavery. It aims to reframe the country’s history by placing the consequences of slavery and the contributions of black Americans at the very center of our national narrative.
  • Discovery of this edit came about earlier this week when Nikole Hannah-Jones went on CNN to deny that she had ever sought to displace 1776 with a new founding date of 1619. She repeated the point in a now-deleted tweet: “The #1619Project does not argue that 1619 was our true founding. We know this nation marks its founding at 1776.” It was not the first time that Hannah-Jones had tried to alter her self-depiction of the project’s aims on account of the controversial line
  • But this time the brazen rewriting of her own arguments proved too much. Hannah-Jones’s readers scoured her own Twitter feed and public statements over the previous year, unearthing multiple instances where she had in fact announced an intention to displace 1776 with 1619.
  • The foremost piece of evidence against Hannah-Jones’s spin, of course, came from the opening passage of from the Times’s own website where it originally announced its aim “to reframe the country’s history” around the year “1619 as our true founding.” When readers returned to that website to cite the line however, they discovered to their surprise that it was no longer there.
  • It wasn’t the only edit that the newspaper made to further conceal its previous denigration of 1776. Prompted by the discovery of the first deletion, Twitter users noticed another suspicious change to the project’s text. The print edition of the 1619 Project from August 2019 contained an introductory passage reading:
  • In August of 1619, a ship appeared on this horizon, near Point Comfort, a coastal port in the British colony of Virginia. It carried more than 20 enslaved Africans, who were sold to the colonists. America was not yet America, but this was the moment it began.
  • The website version of the 1619 Project now reads: In August of 1619, a ship appeared on this horizon, near Point Comfort, a coastal port in the English colony of Virginia. It carried more than 20 enslaved Africans, who were sold to the colonists. No aspect of the country that would be formed here has been untouched by the years of slavery that followed.
mattrenz16

A Year Later, Who Is Back to Work and Who Is Not? - The New York Times - 0 views

www.nytimes.com/...d-employment-demographics.html

shared by mattrenz16 on 09 Mar 21 - No Cached
  • As a proportion of their employment levels before the pandemic, significantly fewer Black and Hispanic women are working now than any other demographic, according to the latest government data — and women are lagging behind men across race and ethnicity.
  • Hispanic women fell into the deepest hole at the peak of the job losses, going from 12.4 million workers in February 2020, the last month of job gains before the pandemic, to 9.4 million in April — a 24 percent drop.
  • No demographic has returned to prepandemic employment levels, but significant differences remain. There are nearly 10 percent fewer employed Black women than a year ago, but only 5 percent fewer employed white men.
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  • One way to see disparities in employment that existed well before the pandemic is to look at the share who are employed among the working age population in each demographic over time. This measure, known as the employment-population ratio, has long been lower for women and Black men.
  • Workers on the older and younger ends of the spectrum also experienced outsize losses. Younger people, who also tend to be overrepresented in some of the most affected industries like food service, were much more likely to lose work early in the outbreak and are still among the farthest from their prepandemic employment levels. However, they have regained jobs more rapidly than older people, who may be more wary of returning to work and increasing their exposure to the coronavirus.
  • One common feature is that many people who lost jobs earned low wages. According to an analysis from the Economic Policy Institute, a left-leaning research group, workers in the lowest quartile of earners lost almost eight million jobs from 2019 to 2020, while the highest wage earners gained jobs.
aleija

Opinion | We Were Born to Be Wild - The New York Times - 0 views

www.nytimes.com/...th-day-nature-environment.html

Culture Climate Change

shared by aleija on 19 Apr 21 - No Cached
  • For songbirds, visiting a feeder or a birdbath is like going to a rave unmasked. If one of them is sick, others will also get sick. And by “others,” I mean more than just birds: Many avian viruses, bacteria and funguses can infect human beings and their pets, too.
  • I find all creatures fascinating, and have ever since I was a little girl, but I pay more attention to them now because I know how much harder my species is making life for all the others.
  • During my childhood in the 1960s, it was common to see people casually throwing trash out of their car windows, but these days human indifference to the natural world tends to be better hidden, even from ourselves.
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  • Market forces have worked hard to make sure we don’t notice the depredations we’re complicit in: the microplastics that pollute our waterways every time we wash a fleece jacket or a polyester blouse, the toilet tissue that’s destroying the boreal forest, the poisons we spray on our yards — up to 10 times as much, per acre, as farmers use — because they are marketed to us as benign “applications.”
  • Many people no longer feel a connection to the natural world because they no longer feel themselves to be a part of it. We’ve come to think of nature as something that exists a car ride away. We don’t even know the names of the trees in our own yards.
  • Nature is all around us anyway, and I’m not talking about just the songbirds and the cottontail rabbits in any suburban neighborhood. I’m talking about the coyote holed up in a bathroom at Nashville’s downtown convention center; the red-tailed hawks nesting in Manhattan; the raccoon climbing a skyscraper in St. Paul, Minn.; the black bear lounging in a Gatlinburg, Tenn., hot tub; the eastern box turtle knocking on my friend Mary Laura Philpott’s front door.
  • Recognizing that kinship will do more than keep our fellow creatures safer. It will also keep us safer, and make us happier, too.
Javier E

Why Study History? (1985) | AHA - 0 views

www.historians.org/...why-study-history-(1985)

history study historiography learning teaching education

shared by Javier E on 17 Mar 21 - No Cached
  • Isn't there quite enough to learn about the world today? Why add to the burden by looking at the past
  • Historical knowledge is no more and no less than carefully and critically constructed collective memory. As such it can both make us wiser in our public choices and more richly human in our private lives.
  • Collective memory is similar, though its loss does not immediately paralyze everyday private activity. But ignorance of history-that is, absent or defective collective memory-does deprive us of the best available guide for public action, especially in encounters with outsider
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  • Without individual memory, a person literally loses his or her identity, and would not know how to act in encounters with others. Imagine waking up one morning unable to tell total strangers from family and friends!
  • what if the world is more complicated and diverse than words can ever tell? What if human minds are incapable of finding' neat pigeon holes into which everything that happens will fit?
  • This value of historical knowledge obviously justifies teaching and learning about what happened in recent times, for the way things are descends from the way they were yesterday and the day before that
  • in fact, institutions that govern a great deal of our everyday behavior took shape hundreds or even thousands of years ago
  • Only an acquaintance with the entire human adventure on earth allows us to understand these dimensions of contemporary reality.
  • Memory is not something fixed and forever. As time passes, remembered personal experiences take on new meanings.
  • Collective memory is quite the same. Historians are always at work reinterpreting the past, asking new questions, searching new sources and finding new meanings in old documents in order to bring the perspective of new knowledge and experience to bear on the task of understanding the past.
  • what we know and believe about history is always changing. In other words, our collective, codified memory alters with time just as personal memories do, and for the same reasons.
  • skeptics are likely to conclude that history has no right to take student time from other subjects. If what is taught today is not really true, how can it claim space in a crowded school curriculum?
  • Often it is enough for experts to know about outsiders, if their advice is listened to. But democratic citizenship and effective participation in the determination of public policy require citizens to share a collective memory, organized into historical knowledge and belief
  • What if we have to learn to live with uncertainty and probabilities, and act on the basis of the best guesswork we are capable of?
  • Then, surely, the changing perspectives of historical understanding are the very best introduction we can have to the practical problems of real life. Then, surely, a serious effort to understand the interplay of change and continuity in human affairs is the only adequate introduction human beings can have to the confusing flow of events that constitutes the actual, adult world.
  • it follows that study of history is essential for every young person.
  • Systematic sciences are not enough. They discount time, and therefore oversimplify reality, especially human reality.
  • Memory, indeed, makes us human. History, our collective memory, carefully codified and critically revised, makes us social, sharing ideas and ideals with others so as to form all sorts of different human groups
  • The varieties of history are enormous; facts and probabilities about the past are far too numerous for anyone to comprehend them all. Every sort of human group has its own histor
  • Where to start? How bring some sort of order to the enormous variety of things known and believed about the past?
  • But abandoning the effort to present a meaningful portrait of the entire national and civilizational past destroyed the original justification for requiring students to study history
  • This second course was often broadened into a survey of Western civilization in the 1930s and 1940s
  • But by the 1960s and 1970s these courses were becoming outdated, left behind by the rise of new kinds social and quantitative history, especially the history of women, of Blacks, and of other formerly overlooked groups within the borders of the United States, and of peoples emerging from colonial status in the world beyond our borders.
  • much harder to combine old with new to make an inclusive, judiciously balanced (and far less novel) introductory course for high school or college students.
  • Early in this century, teachers and academic administrators pretty well agreed that two sorts of history courses were needed: a survey of the national history of the United States and a survey of European history.
  • Competing subjects abounded, and no one could or would decide what mattered most and should take precedence. As this happened, studying history became only one among many possible ways of spending time in school.
  • The costs of this change are now becoming apparent, and many concerned persons agree that returning to a more structured curriculum, in which history ought to play a prominent part, is imperative.
  • three levels of generality seem likely to have the greatest importance for ordinary people.
  • First is family, local, neighborhood history
  • Second is national history, because that is where political power is concentrated in our time.
  • Last is global history, because intensified communications make encounters with all the other peoples of the earth increasingly important.
  • Other pasts are certainly worth attention, but are better studied in the context of a prior acquaintance with personal-local, national, and global history. That is because these three levels are the ones that affect most powerfully what all other groups and segments of society actually do.
  • National history that leaves out Blacks and women and other minorities is no longer acceptable; but American history that leaves out the Founding Fathers and the Constitution is not acceptable either. What is needed is a vision of the whole, warts and all.
  • the study of history does not lead to exact prediction of future events. Though it fosters practical wisdom, knowledge of the past does not permit anyone to know exactly what is going to happen
  • Consequently, the lessons of history, though supremely valuable when wisely formulated, become grossly misleading when oversimplifiers try to transfer them mechanically from one age to another, or from one place to another.
  • Predictable fixity is simply not the human way of behaving. Probabilities and possibilities-together with a few complete surprises-are what we live with and must learn to expect.
  • Second, as acquaintance with the past expands, delight in knowing more and more can and often does become an end in itself.
  • On the other hand, studying alien religious beliefs, strange customs, diverse family patterns and vanished social structures shows how differently various human groups have tried to cop
  • Broadening our humanity and extending our sensibilities by recognizing sameness and difference throughout the recorded past is therefore an important reason for studying history, and especially the history of peoples far away and long ago
  • For we can only know ourselves by knowing how we resemble and how we differ from others. Acquaintance with the human past is the only way to such self knowledge.
Javier E

All Signs Point to Higgs Boson, but Still Waiting for Scientific Certainty - NYTimes.com - 1 views

www.nytimes.com/...-for-scientific-certainty.html

higgs boson universe physics prediction

shared by Javier E on 10 Mar 13 - No Cached
  • physicists admit that it will take more work and analysis before they will have the cold numbers that clinch the case that the new particle announced on July 4 last year is in fact the exact boson first predicted by Peter Higgs and others in 1964 to be the arbiter of mass and cosmic diversity
  • What happened in the first instant of the Big Bang? What happens at the middle of a black hole where matter and time blink in or out of existence? What is the dark matter whose gravitational influence, astronomers say, shapes the structures of galaxies, or the dark energy that is forcing the universe apart? Why is the universe full of matter but not antimatter? And what, finally, is the fate of the universe? These are all questions that the Standard Model, the vanilla-sounding set of equations that ruled physics for the last half century, does not answer
  • Some of them could be answered by the unproven theory called supersymmetry, which among other things is needed to explain why whatever mass the Higgs has is low enough to be discovered in the first place and not almost infinite. It predicts a whole new population of elementary particles — called superpartners to the particles physicists already know about — one of which could be the dark matter that pervades the universe. If such particles exist, they would affect the rate at which Higgs bosons decay into other particles, but the CERN teams have yet to record what they consider a convincing deviation from the Standard Model predictions for those decays. Supersymmetry is still at best a beautiful idea.
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  • One thing that has hampered progress is that physicists still do not agree on how much the new particle weighs.
  • What does it matter how much a Higgs boson weighs? It could determine the fate of the universe.
  • his colleagues ran the numbers and concluded that the universe was in a precarious condition and could be prone to collapse in the far, far future. The reason lies in the Higgs field, the medium of which the Higgs boson is the messenger and which determines the structure of empty space, i.e., the vacuum.
  • It works like this. The Higgs field, like everything else in nature, is lazy, and, like water running downhill, always seeks to be in the state of lowest energy. Physicists assume that the Higgs field today is in the lowest state possible, but Dr. Giudice found that was not the case. What counts as rock bottom in today’s universe could turn out to be just a plateau. Our universe is like a rock perched precariously on a mountaintop, he explained, in what physicists call a metastable state. The Higgs field could drop to a lower value by a process known as quantum tunneling, although it is not imminent.
  • If that should happen — tomorrow or billions of years from now — a bubble would sweep out through the universe at the speed of light, obliterating the laws of nature as we know them.
  • The calculations assume that the Standard Model is the final word in physics, good for all times and places and energies — something that no physicist really believes. Theories like supersymmetry or string theory could intercede at higher energies and change the outcome.
  • The calculations also depend crucially on the mass of the top quark, the heaviest known elementary particle, as well as the Higgs, neither of which have been weighed precisely enough yet to determine the fate of the universe. If the top quark were just a little lighter or the Higgs a little heavier, 130 billion electron volts, Dr. Giudice said, the vacuum would in fact be stable.
  • , “Why do we happen to live at the edge of collapse?” He went on, “In my view, the message about near-criticality of the universe is the most important thing we have learned from the discovery of the Higgs boson so far.” Guido Tonelli of CERN and the University of Pisa, said, “If true, it is somehow magic.” We wouldn’t be having this discussion, he said, if there hadn’t been enough time already for this universe to produce galaxies, stars, planets and “human beings who are attempting to produce a vision of the world,” he said.
  • “So, in some sense, we are here, because we have been lucky, because for this particular universe the lottery produced a certain set of numbers, which allow the universe to have an evolution, which is very long.”
Javier E

How The 0.1 Percent Lives Now - The Dish | By Andrew Sullivan - The Daily Beast - 0 views

andrewsullivan.thedailybeast.com/...ret-economy-of-tax-havens.html

inequality global wealth reseach

shared by Javier E on 24 Jul 12 - No Cached
  • Wealthy individuals may have been hiding as much as $32 trillion offshore at the end of 2010, according to Tax Justice Network, a U.K.-based organization that campaigns for transparency in the financial system. The estimate is almost three times the organization’s last estimate of $11.5 trillion in 2005. Fewer than 100,000 people own $9.8 trillion of offshore assets, according to the research, carried out by former McKinsey & Co. economist James Henry. There is a "huge black hole in the world economy" of untaxed private wealth, Henry said in a statement. "The lost tax revenue implied by our estimates is huge."
  • "These estimates reveal a staggering failure," says John Christensen of the Tax Justice Network. "Inequality is much, much worse than official statistics show, but politicians are still relying on trickle-down to transfer wealth to poorer people. This new data shows the exact opposite has happened: for three decades extraordinary wealth has been cascading into the offshore accounts of a tiny number of super-rich." ... In many cases, the total worth of these assets far exceeds the value of the overseas debts of the countries they came from.
  • We increasingly live in two worlds: the one where 99.9 percent of us live, and a separate, transnational society of the super-wealthy. One of whom we may elect to the presidency of the United States with the avowed intent of making those extremely wealthy people even wealthier.
grayton downing

U.N. Appeals for $301 Million for Typhoon Response in the Philippines - NYTimes.com - 0 views

www.nytimes.com/...s-typhoon-haiyan-response.html

appeals million typhoon response philippines crisis

shared by grayton downing on 13 Nov 13 - No Cached
  • “At this early stage, the big issue for us is moving people and aid supplies to the affected area,”
  • “Right now we’re operating in a relative black hole of information. We know from the very little we can see that the situation is terrible. But it’s what we don’t see that’s the most worrying.”
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