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manhefnawi

Quantum math makes human irrationality more sensible | Science News - 0 views

  • People often say that quantum physics is weird because it doesn’t seem rational. But of course, if you think about it, quantum physics is actually perfectly rational, if you understand the math. It’s people who typically seem irrational.
  • In fact, some psychologists have spent their careers making fun of people for irrational choices when presented with artificial situations amenable to statistical analysis. Making allowances for sometimes shaky methodology, there really are cases where people make choices that don’t seem to make much sense.
  • In 1929, Bohr noted that quantum physics refuted the view that analyzing brain processes could “reveal a causal chain that formed a unique representation of the emotional mental experience.” But in quantum physics, Bohr emphasized, an observer inevitably interacted with whatever was being observed, so “any attempt to acquire a knowledge of such [mental] processes involves a fundamentally uncontrollable interference with their course.”
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  • “If we replace ‘human judgments’ with ‘physical measurements,’” Wang and colleagues write, “and replace ‘cognitive system’ with ‘physical system,’ then these are exactly the same reasons that led physicists to develop quantum theory in the first place.”
johnsonel7

Do Babies Cry in Different Languages? - NYT Parenting - 0 views

  • This was the moment Dr. Wermke, a biologist and medical anthropologist who studies babies’ first sounds, had been waiting for. She made a recording for later analysis in her lab, Würzburg University Clinic’s Center for Pre-Speech Development and Developmental Disorders. But even without the aid of computerized tools, Dr. Wermke could make out a distinctive pattern in Joris’s wail.“He really cried in German just now, right?” she said, smiling as she packed up her equipment.
  • In 2009, Dr. Wermke’s and her colleagues made headlines with a study showing that French and German newborns produce distinctly different “cry melodies,” reflecting the languages they heard in utero: German newborns produce more cries that fall from a higher to a lower pitch, mimicking the falling intonation of the German language, while French infants tend to cry with the rising intonation of French. At this age, babies experiment with a wide variety of sounds, and can learn any language. But they are already influenced by their mother tongue.
  • After they are born, young babies mimic many different sounds. But they are especially shaped by the prosody they heard in the womb, which becomes a handy guide to the strange sounds coming from the people around them. Through stress, pauses and other cues, prosody cuts up the stream of sound into words and phrases – that is, into speech.
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  • The 2-month-old with hearing problems also makes a leap. Nine days after receiving a hearing aid, his irregular, choked cries have given way to confident experiments with vowel sounds.
  • All parents, Dr. Wermke said, have an innate ability to understand and respond to their babies. Indeed, it was mothers who supported her research from the beginning, even as other scientists were skeptical. In the 1980s, when Dr. Wermke first began recording babies’ sounds, many researchers viewed crying as a mere biological alarm signal, worth investigating only in the context of problems such as colic. But mothers never doubted that their tiny babies were worth studying. As Judith Fricke, little Joris’s mother, said, “I think you’d recognize the sound of your own child among a hundred others. You develop an ear for that.”
tongoscar

Oceans are warming at the same rate as if five Hiroshima bombs were dropped in every second - CNN - 0 views

shared by tongoscar on 20 Jan 20 - No Cached
  • An international team of 14 scientists examined data going back to the 1950s, looking at temperatures from the ocean surface to 2,000 meters deep.
  • The study shows that while the oceans warmed steadily between 1955 and 1986, warming has accelerated rapidly in the last few decades. Between 1987-2019, ocean warming was 450% greater than during the earlier time period.
  • That's equivalent to dropping roughly four Hiroshima bombs into the oceans every second over the past quarter of a century. But because the warming is speeding up, the rate at which we are dropping these imaginary bombs is getting faster than ever.
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  • Oceans serve as a good indicator of the real impact of climate change. Covering almost three quarters of Earth's surface, they absorb the vast majority of the world's heat. Since 1970, more than 90% of the planet's excess heat went into the oceans, while less than 4% was absorbed by the atmosphere and the land, the study said.
  • But just because people live on land doesn't mean they are immune from the effects of the warming waters. Ocean warming has a profound impact on the entire world.
katherineharron

Trump's rebuke of Fauci encapsulates rejection of science in virus fight - CNNPolitics - 0 views

  • Trump broke with Fauci, who has served under six presidents, on Wednesday over the infectious disease expert's warnings that getting businesses and schools back open too quickly would lead to unnecessary suffering and death.
  • The delicate dynamic between Fauci and Trump has been watched for months. Its latest fraying marks the most pronounced clash yet in the tussle between science and politics that has long plagued the administration's fight against the coronavirus.
  • He has yet to initiate a serious national conversation about the vital need to get the economy firing again balanced against the level of death and illness that is acceptable to the country given that the pandemic could worsen if states open up too quickly.
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  • Ironically, another of Trump's failings, one in which Fauci may be in some ways complicit as a member of the coronavirus task force -- to stand up a comprehensive national testing and tracking system -- may frustrate the President's effort to get the country up and running quickly with no vaccine in sight.
  • The gulf between Trump's approach and scientific rationality is expected to be further underscored Thursday with House testimony from Dr. Rick Bright, who says he was ousted from his job developing a coronavirus vaccine because he questioned Trump's enthusiasm for hydroxychloroquine, an unproven treatment for Covid-19. Bright will warn, according to his prepared testimony, that the US could face "unprecedented illness" and the "darkest winter in modern history" if it doesn't do a better job of preparing for a second wave of the pandemic.
  • Trump's use of the world "acceptable" in relation to Fauci's comments is instructive about how he sees subordinates in his administration. The history of his three years in power shows that officials who do not provide the justification and the pretext for his actions or who prefer to act on their own perceptions of the national interest are eventually ousted.
  • In recent weeks, Trump has shifted from an approach rooted in benchmarks for phased state openings based on a waning of the virus to one based on opening the economy whatever the cost.
  • Rising attacks on Fauci have taken their toll on his standing with the President's supporters, even though he is warmly regarded by the rest of the country. In a new CNN/SSRS poll, 84% of Republicans say they trust Trump to give them information on the virus. Only 61% of the same slice of the electorate say they trust Fauci, who has headed the National Institute of Allergy and Infectious Diseases since 1984.
  • "I'm a scientist, a physician and a public health official. I give advice, according to the best scientific evidence," he said. "I don't give advice about economic things."
marleen_ueberall

9 Surprising Health Benefits Of Learning A Foreign Language - 0 views

  • You already know that learning a foreign language can put you ahead in your career.But there’s a growing body of evidence that the health benefits of learning a foreign language may be significant as well.
  • Being able to speak another language can help you make better decisions.
  • A heightened appreciation of the complexities of a situation can lead to more rational decision-making in many areas of life. Monolingual people, on the other hand, tend to base their decisions more on emotions.
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  • Learning a foreign language helps improve memory
  • (Working memory deals with the storage and processing of information over a short period of time.)
  • Speaking a second language helps you focus, and deal with distractions appropriately
  • A bilingual person is accustomed to switching between different languages, deciding which is the appropriate language to use in a given situation
  • This gives the brain plenty of practice in focusing and filtering information.
  • Related to your attention span is your ability to multi-task.
  • Speaking two languages, and switching between them, makes you better at multi-tasking in other tasks, too.
    • marleen_ueberall
       
      We talked about multi-tasking and that there is a higher chance that multi-tasking is not possible.
  • Speaking more than one language provides constant exercise for your brain, and keeping your brain active is one way in which to delay the onset of dementia.
  • What this perceptual sensitivity could mean, is that babies raised with two languages will find it easier to learn other languages later in life, as a result of the ability to easily distinguish between different sounds.
  • Bilingual people have also been shown to have better cognitive abilities than monolinguals.
  • Interestingly, this is regardless of what age the person learns the foreign language, so even a person who learns a foreign language as an adult will benefit from these improved skills.
  • By learning another language, your mother tongue can improve as a result. As you learn a second language, your knowledge of grammar improves.
  • In fact, as crazy as it may sound, learning a foreign language can actually increase the size of your brain.
  • In this study, two groups of subjects underwent brain scans. One group did an intensive language course for three months while the other, the control group, did intensive courses in a subject that was not a language. What the scientists found was that specific parts of the language learners’ brains became bigger than those of the non-language learners.
  • Given all the benefits outlined in this article, it’s hardly surprising that learning a foreign language keeps your brain healthy for longer
  • The benefits of multiple languages can start as early as before a baby is able to speak
  • Whatever your age, the health benefits of learning a foreign language make it a surefire way to upgrade your life, and future-proof your brain for old age.
sanderk

Opinion | Why Our Memory Fails Us - The New York Times - 0 views

  • Dr. Tyson implied that President Bush was prejudiced against Islam in order to make a broader point about scientific awareness: Two-thirds of the named stars actually have Arabic names, given to them at a time when Muslims led the world in astronomy — and Mr. Bush might not have said what he did if he had known this fact.This is a powerful example of how our biases can blind us. But not in the way Dr. Tyson thought. Mr. Bush wasn’t blinded by religious bigotry. Instead, Dr. Tyson was fooled by his faith in the accuracy of his own memory.
  • When he was first asked for the source of Mr. Bush’s quotation, Dr. Tyson insisted, “I have explicit memory of those words being spoken by the president. I reacted on the spot, making note for possible later reference in my public discourse. Odd that nobody seems to be able to find the quote anywhere.” He then added, “One of our mantras in science is that the absence of evidence is not the same as evidence of absence.”
  • We recall events easily and often, at least if they are important to us, but only rarely do we find our memories contradicted by evidence, much less take the initiative to check if they are right. We then rely on confidence as a signal of accuracy — in ourselves and in others.
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  • But when our own memories are challenged, we may neglect all this and instead respond emotionally, acting as though we must be right and everyone else must be wrong
  • This fall the panel (which one of us, Daniel Simons, served on) released a comprehensive report that recommended procedures to minimize the chances of false memory and mistaken identification, including videotaping police lineups and improving jury instructions.
  • In general, if you have seen something before, your confidence that you have seen it and your accuracy in recalling it are linked: The more confident you are in your memory, the more likely you are to be right. But new research reveals important nuances about this link.
  • But when people mistakenly recalled words that were similar to those on the lists but not actually on the lists — a false memory — they also expressed high confidence.
  • When we recall our own memories, we are not extracting a perfect record of our experiences and playing it back verbatim. Most people believe that memory works this way, but it doesn’t. Instead, we are effectively whispering a message from our past to our present, reconstructing it on the fly each time.
  • In Dr. Tyson’s case, once the evidence of his error was undeniable, he didn’t dig his hole deeper or wish the controversy away. He realized that his memory had conflated his experiences of two memorable and personally significant events that both involved speeches by Mr. Bush. He probably still remembers it the way he described it in his talks — but to his credit, he recognizes that the evidence outweighs his experience, and he has publicly apologized.
  • Good scientists remain open to the possibility that they are wrong, and should question their own beliefs until the evidence is overwhelming. We would all be wise to do the same.
  • Politicians should respond as Dr. Tyson eventually did: Stop stonewalling, admit error, note that such things happen, apologize and move on
Javier E

The Masks Masquerade - INCERTO - Medium - 0 views

  • Highlight
  • First error: missing the compounding effect
  • People who are good at exams (and become bureaucrats, economists, or hacks), my experience has been, are not good at understanding nonlinearities and dynamics.
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  • The WHO, CDC and other bureaucracies initially failed to quickly realize that the benefits of masks compound, simply because two people are wearing them and you have to look at the interaction.
  • Let us say (to simplify) that masks reduce both transmission and reception to p. What effect on the R0(that is, the rate of spreading of the infection)?
  • Simply the naive approach (used by the CDC/WHO bureaucrats and other imbeciles) is to say if masks reduce the transmission probability to ¼, one would think it would then drop from, say R0= 5, to R0=1 ¼. Yuuge, but there is better.
  • For one should count both sides. Under our simplification, with p=1/4 we get R0'= p² R0 . The drop in R becomes 93.75%! You divide R by 16! Even with masks working at 50% we get a 75% drop in R0.
  • Second error: Missing the Nonlinearity of the Risk of Infection
  • we are in the convex part of the curve. For example, to use the case above, a reduction of viral load by 75% for a short exposure could reduce the probability of infection by 95% or more!
  • Third Error: Mistaking Absence of Evidence for Evidence of Absence
  • “There is no evidence that masks work”, I kept hearing repeated to me by the usual idiots calling themselves “evidence based” scientists. The point is that there is no evidence that locking the door tonight will prevent me from being burglarized. But everything that may block transmission could help.
  • Unlike school, real life is not about certainties. When in doubt, use what protection you can
  • Fourth Error: Misunderstanding the Market and PeoplePaternalistic bureaucrats resisted inviting the general public to use masks on grounds that the supply was limited and would be needed by health professionals — hence they lied to us saying “masks are not effective”
  • Fifth Error: Missing Extremely Strong Statistical Signals
  • they fear to be presenting “anecdotes”, and fail to grasp the broader notion of statistical signals where you look at the whole story, not the body parts.
  • evidence compounds.
  • We have a) the salon story where two infected stylists failed to infect all their 140 clients (making the probability of infection for bilateral mask wearing safely below 1% for a salon-style exposure)
  • plus b) the rate of infection of countries where masks were mandatory
  • plus c) tons of papers with more or less flawed methodologies, etc.
  • Sixth Error: The Non-Aggression Principle
  • “Libertarians” (in brackets) are resisting mask wearing on grounds that it constrains their freedom. Yet the entire concept of liberty lies in the Non-Aggression Principle, the equivalent of the Silver Rule: do not harm others; they in turn should not harm you.
  • Even more insulting is the demand by pseudolibertarians that Costco should banned from forcing customers to wear mask — but libertarianism allows you to set the rules on your own property. Costco should be able to force visitors to wear pink shirts and purple glasses if they wished.
  • Note that by infecting another person you are not infecting just another person. You are infecting many many more and causing systemic risk.
katherineharron

Mindfulness: How it could help you be happier, healthier and more successful - CNN - 0 views

  • "Change in humanity must start from individuals," the Dalai Lama told the mayors. "We created this violence, so we can reduce this violence."
  • Paying attention to the matters at hand may sound simple, but most Americans aren't doing it, studies show. Though the experts say there's a lot more research to be done, the number of scientific studies has grown exponentially over the past decade. They show that mindfulness is more than a passing fad; there's early evidence it can help your health.
  • n their 2010 study, they created a computer program that sent questions at random moments to people by iPhone. The program asked, "How are you feeling right now?" "What are you doing right now?" and "Are you thinking about something other than what you're currently doing?"
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  • Of the 2,250 adults who answered the pings, 46.9% were not thinking about the task they were doing at the moment. This was the case for 30% of their activities, with one exception: during sex. That, apparently, had
  • their full attention.
  • To remain mindful, the Dalai Lama said, he sleeps a lot: about nine hours a night. He also gets up at 3 a.m. to meditate. He has another session in the afternoon and one more right before bed.
  • Scientists had Buddhist monks meditate while being scanned by an MRI machine. While strapped to a board and put in the huge, noisy machine, the monks calmed their minds, reduced distractions and paid attention to life moment-by-moment.
  • The participants were then subjected to a stressful day-long training exercise. Both groups had similar spikes in blood pressure and breathing rates during the test, but when it was over, the mindfully trained Marines' heart rate and breathing recovered much faster, as did their nervous systems.
  • The data on stress reduction is pretty good," said Richard J. Davidson, founder of the Center for Healthy Minds at the University of Wisconsin-Madison. He has published hundreds of scientific papers about the impact of emotion on the brain and did some of the first MRIs of meditating Buddhist monks.
  • Several workplace studies found that employees who get mindfulness training become more productive and stable. They demonstrate more self-control and efficiency. Employees with mindfulness training also seem to pick up on things faster and can read group dynamics better.
  • Davidson suggests that the data are "much weaker and less convincing" as mindfulness relates to curing a specific disease.It can't cure cancer or chronic pain, but the practice can help manage some of the symptoms. For instance, if you have chronic lower back pain, mindfulness may be as helpful as medication at easing that pain.
katherineharron

Lawmakers around the nation are proposing bills for -- and against -- vaccinations - CNN - 0 views

  • At a time when almost everything is politicized, vaccination has planted itself squarely on the national stage.
  • On one side of the debate are parents who are rebelling against settled science and calling on states to broaden vaccine exemptions. They cite their faith or believe vaccines pose danger to their children, even though no major religion opposes them and claims of vaccines' link to autism has been long debunked.
  • "I won't be surprised if we see many pro-vaccine bills this year," said Dr. Sean O'Leary, a member of the American Academy of Pediatrics Committee on Infectious Diseases. "The measles outbreaks were really a wake-up call, showing legislators that maintaining high vaccination rates is not just a theoretical goal."
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  • An overwhelming majority of American adults (88%) say the benefits of the measles, mumps and rubella (MMR) vaccine outweigh the risks, according to a new Pew Research Center survey.And last year, 14 states proposed eliminating religious exemptions for vaccines -- a marked increase from years past, according to the American Academy of Pediatrics.
  • "When you choose not to vaccinate, you're putting your child at risk of disease, but you're also putting other people at risk," O'Leary said.
  • "We need to have the ability in our country, if we find a commercial pharmaceutical product is not as safe and effective as we're being told it is, we should have the right to make informed consent to use the product," she said.
  • "When vaccination rates fall, we see disease, and people suffer. Protecting children in schools is a worthy goal of government, regardless of political affiliation," he said. "There's really no good reason to exempt your child from vaccination -- only medical."
  • "Science is really on the side of vaccinations," said O'Leary, who is an associate professor of pediatrics at the University of Colorado School of Medicine. "They're one of the best public health interventions in history in terms of the numbers of lives saved. The benefits far outweigh the risk."
  • New York, California and Washington state took action after massive measles outbreaks in 2019, a year that saw the highest reported measles cases since the disease was declared eliminated nationwide in 2000.
  • Many of the religious exemption laws are not new. Several states first passed them in the 1960s and 1970s, thanks to an influx of lobbyists from the Christian Science Church, which doesn't ban members from using vaccines but encourages healing through prayer.
  • Supporters of vaccine exemptions see laws like those passed in New York and Washington as "fundamentally a threat to their ability to make informed consent about vaccinations," said Fisher, president of the National Vaccine Information Center.
  • Proponents on both sides of the debate have found allies across the political spectrum. Republican lawmakers have sponsored stricter bills, and Democratic governors have drawn the line at mandating vaccines.
  • "It's a tough balance, but you're using a public -- and private -- resource in conjunction with lots of other kids," Harris told CNN. "There are other venues where they can be educated, they can still have their freedom, but they're not going into a public school and spread their disease."
katherineharron

In race for coronavirus vaccine, hurled insults and the wisdom of Spider-Man - CNN - 0 views

  • Ethicists and physicians are concerned that, amid a desire to put an end to the Covid-19 pandemic, developers of drugs and vaccines have become overly enthusiastic about the chances their products will work.
  • Oxford has recently walked back some of its optimism, but for months, it set a tone that its vaccine was the most promising, without any solid evidence that this was based in fact.
  • Third, one leader in the Oxford team has gone so far as to denigrate other teams trying to get a Covid vaccine on the market, calling their technology "weird" and labeling it as merely "noise." Such name-calling is highly unusual and aggressive among scientists.
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  • "At this point, the Oxford researchers have no idea whether they have something or not," Offit said. "You just get so tired of this 'science by press release.' "
  • There are currently 10 vaccines in human clinical trials worldwide, according to the World Health Organization. Four of the teams are in the United States: Moderna, Pfizer, Inovio and Novavax.
  • Moderna CEO Stéphane Bancel referred to the results as "positive interim Phase 1 data" and that "the Moderna team continues to focus on moving as fast as safely possible to start our pivotal Phase 3 study in July."
  • Moderna is collaborating on its vaccine development with the National Institute of Allergy and Infectious Diseases. Dr. Anthony Fauci, the director of NIAID, said while Moderna's numbers were limited, "it was good news" and he was "cautiously optimistic" about the vaccine.
  • Inovio and Moderna have said they expect their large-scale clinical trials, known as Phase 3 trials, to last around six months. Pfizer hasn't given a timetable for its Phase 3 trial.
  • "I've not seen anyone wrap up a Phase 3 trial in a month to six weeks," said Dr. Saad Omer, a Yale University infectious disease expert who's done clinical trials on polio, pertussis and influenza vaccines. "We need to benchmark this against realistic expectations."
  • "As vaccine researchers like to say, mice lie and monkeys exaggerate," Offit said.
  • One big stumbling block for any vaccine trial is that Covid-19 infection rates in many areas of the world are flattening out or declining.
  • The Oxford vaccine uses what's called an adenovirus vector. Adenoviruses cause the common cold, but in this case, the adenoviruses are weakened and modified to deliver genetic material that codes for a protein from the novel coronavirus. The body then produces that protein and, ideally, develops an immune response to it.
  • "Compared to previous vaccines, this method is more robust, more versatile, and yet, equally efficient," according to the blog, which notes that the Bill & Melinda Gates Foundation invested $53 million in a German biotech company that specializes in RNA vaccines.
  • Inovio's technology uses a brief electrical pulse to deliver plasmids, or small pieces of genetic information, into human cells. Inovio says those cells then produce the vaccine, which leads to an immune response.
  • On April 19, the BBC's Andrew Marr said he asked Gilbert "if it's guaranteed that a workable vaccine can actually be produced."
  • "Nobody can be absolutely sure it's possible. That's why we have to do trials. We have to find out. I think the prospects are very good, but it's clearly not completely certain,"
  • "It certainly worked in monkeys," Oxford's Hill told CNN's Burnett May 15. "That was quite an impressive impact and that was our first try, if you like, with a standard dose, a single dose of vaccine."
  • "I buy that this is a pandemic and we may need to show progress and show steps, and I'm OK with making forecasts if decision makers want that, but do it with a level of uncertainty, because that's what's warranted," said Omer, director of the Yale Institute for Global Health.
  • "Now researchers can't wait to step out to the microphone -- and there are so many microphones out there -- to say, 'I've got it! This looks really good!' " Offit said.
krystalxu

1.2 The Evolution of Psychology: History, Approaches, and Questions | Introduction to Psychology - 0 views

  • Nature versus nurture. Are genes or environment most influential in determining the behavior of individuals and in accounting for differences among people? Most scientists now agree that both genes and environment play crucial roles in most human behaviors, and yet we still have much to learn about how nature (our biological makeup) and nurture (the experiences that we have during our lives) work together (Harris, 1998; Pinker, 2002). T
katherineharron

Mars, already largely desert, is losing water quicker than expected, study says - CNN - 0 views

  • Once, Mars was a warm planet that could potentially support life and water on its surface. But something changed about 3.5 billion years ago and it lost most of its atmosphere.
  • A new study published this week in the journal Science reveals that more water vapor is accumulating in the upper atmosphere of Mars, allowing more of it to escape into space. This means that Mars is losing water more quickly than anticipated.
  • The accumulation of unprecedented amounts of water vapor is occurring about 50 miles up from the Martian surface. The orbiter revealed that parts of the atmosphere actually act like pockets, reaching supersaturated level. These pockets contain anywhere between 10 to a hundred times more water vapor than the atmospheric temperature should allow.
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  • "You wouldn't need a backhoe to dig up this ice. You could use a shovel," said Sylvain Piqueux, study author at NASA's Jet Propulsion Laboratory. "We're continuing to collect data on buried ice on Mars, zeroing in on the best places for astronauts to land."
  • Water exists on Mars in the form of ice beneath the surface, both at the poles and the planet's mid-latitudes. The polar ice is the most well-known because the orbiters have imaged it. Meteors even helped increase understanding of the polar ice because they impact it, allowing the orbiter to take pictures of the disturbed ice.
  • The new map reveals water ice less than a foot beneath the surface in a region of the northern hemisphere called Arcadia Planitia. There is also evidence of water ice two feet deep beneath the surface. The researchers want to learn more about the subsurface ice and if it varies across the Martian seasons. "The more we look for near-surface ice, the more we find," said Mars Reconnaissance Orbiter Deputy Project Scientist Leslie Tamppari. "Observing Mars with multiple spacecraft over the course of years continues to provide us with new ways of discovering this ice."
katherineharron

2019 was the second-hottest year in recorded history - CNN - 0 views

  • Earth endured its second-hottest year on record in 2019, NASA and NOAA scientists announced Wednesday, capping a decade they say was the warmest in recorded history.
  • The annual global climate assessment offers more evidence that the dangerous warming unleashed mostly by humans' burning of fossil fuels is continuing virtually unabated.
  • "This shows that what's happening is persistent, not a fluke due to some weather phenomenon: we know that the long-term trends are being driven by the increasing levels of greenhouse gases in the atmosphere," Gavin Schmidt, director of NASA's Goddard Institute for Space Studies said in announcing the report.
manhefnawi

Adult brains don't grow new neurons in hippocampus, study suggests | Science News - 0 views

  • In stark contrast to earlier findings, adults do not produce new nerve cells in a brain area important to memory and navigation, scientists conclude after scrutinizing 54 human brains spanning the age spectrum.
johnsonel7

'Outlandish' competition seeks the brain's source of consciousness | Science | AAAS - 0 views

  • Brain scientists can watch neurons fire and communicate. They can map how brain regions light up during sensation, decision-making, and speech. What they can't explain is how all this activity gives rise to consciousness.
  • But understanding consciousness has become increasingly important for researchers seeking to communicate with locked-in patients, determine whether artificial intelligence systems can become conscious, or explore whether animals experience consciousness the way humans do.
  • The GWT says the brain's prefrontal cortex, which controls higher order cognitive processes like decision-making, acts as a central computer that collects and prioritizes information from sensory input. It then broadcasts the information to other parts of the brain that carry out tasks.
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  • The project has drawn criticism, mostly because it includes the IIT. Anil Seth, a neuroscientist at the University of Sussex in Brighton, U.K., says the theory is too philosophical—attempting to explain why consciousness exists, rather than how the brain determines whether a stimulus is worthy of conscious attention—to be directly testable.
  • Despite his misgivings about the project's prospect for a decisive answer, Seth says it will spark discussion and collaboration among scientific rivals. "That itself is to be applauded," he says
johnsonel7

Make some noise: How background noise affects brain activity: Scientists take neuroscience outside the lab, investigating how different sorts of background noise affect our focus -- ScienceDaily - 0 views

  • "Why do we prefer to do some tasks in quiet places and others with ambient noise? What is our brain doing to keep us from losing our focus every time we leave the peace and quiet of our homes?" said Joanna Scanlon, lead author of the study who conducted the work as a graduate student in the Department of Psychology. "It's important to understand how the brain processes tasks in different environments."
  • Any time there is background noise, our brain actively works to filter it out -- with the largest effect for fluid, outdoor sounds like vehicle traffic.
  • "These findings show that our environment affects how we perceive the world around us -- and means that much of what we know about the brain is oversimplified since it has primarily been researched in a laboratory setting.
blythewallick

People with Depression Use Language Differently | JSTOR Daily - 0 views

  • New research shows that people with depression use absolute words, such as “always,” “nothing,” or “completely,” more often than others.
  • Scientists have long tried to pin down the exact relationship between depression and language, and technology is helping us get closer to a full picture. Our new study, published in Clinical Psychological Science, has now unveiled a class of words that can help accurately predict whether someone is suffering from depression.
  • So far, personal essays and diary entries by depressed people have been useful, as has the work of well-known artists such as Cobain and Plath. For the spoken word, snippets of natural language of people with depression have also provided insight. Taken together, the findings from such research reveal clear and consistent differences in language between those with and without symptoms of depression.
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  • We know that rumination (dwelling on personal problems) and social isolation are common features of depression. However, we don’t know whether these findings reflect differences in attention or thinking style. Does depression cause people to focus on themselves, or do people who focus on themselves get symptoms of depression?
  • Crucially, those who have previously had depressive symptoms are more likely to have them again. Therefore, their greater tendency for absolutist thinking, even when there are currently no symptoms of depression, is a sign that it may play a role in causing depressive episodes. The same effect is seen in use of pronouns, but not for negative emotion words.
  • From the outset, we predicted that those with depression will have a more black and white view of the world, and that this would manifest in their style of language.
  • Our lab recently conducted a big data text analysis of 64 different online mental health forums, examining over 6,400 members. “Absolutist words” – which convey absolute magnitudes or probabilities, such as “always”, “nothing” or “completely” – were found to be better markers for mental health forums than either pronouns or negative emotion words.
  • But as the World Health Organisation estimates that more than 300m people worldwide are now living with depression, an increase of more than 18% since 2005, having more tools available to spot the condition is certainly important to improve health and prevent tragic suicides such as those of Plath and Cobain.
blythewallick

Social media has limited effects on teenage life satisfaction: Study of teenage social media use and life satisfaction -- ScienceDaily - 0 views

  • This is the first large-scale and in-depth study testing not only whether adolescents who report more social media use have lower life satisfaction but also whether the reverse is true. Before this study scientists had little means of disentangling whether adolescents with lower life satisfaction use more social media or whether social media use leads to lower life satisfaction.
  • Yet there were some bidirectional effects: Lower life satisfaction led to increased social media use and vice versa. These bidirectional effects were more consistent for females than for males, but again, these were modest trends.
  • 'Given the rapid pace of technological advancement in recent years, the question of how our increasing use of technology to interact with each other affects our wellbeing has become increasingly important.
  • ...2 more annotations...
  • 'Applying transparent and innovative statistical approaches we show that social media effects are not a one-way street, they are nuanced, reciprocal, possibly contingent on gender, and arguably trivial in size'.
  • 'Moving forward access to this kind of data will be key to understanding the many roles that social media plays in the lives of young people', Professor Przybylski added.
manhefnawi

Cilia in the brain may be busier than previously thought | Science News - 0 views

  • Nerve cells in the brain make elaborate connections and exchange lightning-quick messages that captivate scientists. But these cells also sport simpler, hairlike protrusions called cilia. Long overlooked, the little stubs may actually have big jobs in the brain.
manhefnawi

Your Brain's Memory Capacity May Be as Big as the World Wide Web | Mental Floss - 0 views

  • In an attempt to understand and measure the brain’s synapses, whose shape and size have remained mysterious to scientists, researchers at the University of Texas, Austin and the Salk Institute worked together to determine that the brain’s memory capacity is much larger than previously understood. The results, published in the journal eLife, estimate that an individual human brain may store as much as a petabyte of information—perhaps 10 times more than previously estimated, and about the equivalent of the World Wide Web.
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