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Skeptical Debunker

Tiny shelled creatures shed light on extinction and recovery 65 million years ago - 0 views

  • Scanning electron micrograph of the nanofossil Chiasmolithus from about 60 million years ago. This genus arose after the Cretacious Paleogene boundary mass extinction. The size about 8 microns.
  • The darkness caused by the collision would impair photosynthesis and reduce nannoplankton reproduction. While full darkness did not occur, the effects in the north would have lasted for up to six months. However, with ample sunlight and large amounts of nutrients in the oceans, the populations should have bounced back, even in the North, but they did not. The researchers suggest that toxic metals that where part of the asteroid, heavily contaminated the Northern oceans and were the major factor inhibiting recovery. "Metal loading is a great potential mechanism to delay recovery," said Bralower. "Toxic levels in the parts per billions of copper, nickel, cadmium and iron could have inhibited recovery." On the one hand, the researchers considered an impact scenario causing perpetual winter and ocean acidification to explain the slow recovery, but neither explains the lag between Southern and Northern Hemispheres. Trace metal poisoning, on the other hand, would have been severe near the impact in the Northern Hemisphere. When the high temperature debris from the impact hit the water, copper, chromium, aluminum, mercury and lead would have dissolved into the seawater at likely lethal levels for plankton. Iron, zinc and manganese -- normally micronutrients -- would reach harmful levels shortly after the impact. Other metal sources might be acid-rain leached soils or the effects of wildfires. Metals like these can inhibit reproduction or shell formation. The toxic metals probably exceeded the ability of organic compounds to bind them and remove them from the system. Because nannoplankton are the base of the food chain, larger organisms concentrate any metals found in nannoplankton making the metal poisoning more effective. With the toxic metals remaining in the oceans and the lack of sunlight, the length of time for recovery might increase.
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    An asteroid strike may not only account for the demise of ocean and land life 65 million years ago, but the fireball's path and the resulting dust, darkness and toxic metal contamination may explain the geographic unevenness of extinctions and recovery, according to Penn State geoscientists.
Janos Haits

Main Page - OpenWetWare - 0 views

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    OpenWetWare is an effort to promote the sharing of information, know-how, and wisdom among researchers and groups who are working in biology & biological engineering. If you would like edit access, would be interested in helping out, or want your lab website hosted on OpenWetWare, please join us. OpenWetWare is managed by the BioBricks Foundation."
Dave James

Apply For A Same Day Loans To Acquire Speedy Fiscal Backing At Emergency Time - 0 views

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    In the event that you might want to recuperate your money related misfortune or evacuate the obligations quackery, then same day loans would be reasonable one. You would get the cash around the same time you would apply. Trustful financial services would help you to get advance sum at sensible rate.
Erich Feldmeier

The Top 10 papers in Biological Sciences by Mendeley readership. - 0 views

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    William Gunn The Top 10 papers in Biological Sciences by Mendeley readership. With the Mendeley for Life Scientists webinar coming up on Thursday, I thought I would take a look at the readership stats for Biological Sciences. Biological Sciences has long been our biggest discipline, and having done my doctoral work in the Life Sciences, I knew this would be interesting. Overall, researchers in bioinformatics contributed most strongly to the most read papers, along with the older disciplines of micro- and molecular biology. Regardless of discipline, however, it's clear that the days of toiling away in isolation to thoroughly study one gene are over. Today, it's all about huge consortia and massive data. Here's what I found
Ivan Pavlov

Did a hyper-black hole spawn the Universe? : Nature News & Comment - 0 views

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    In our Universe, a black hole is bounded by a spherical surface called an event horizon. Whereas in ordinary three-dimensional space it takes a two-dimensional object (a surface) to create a boundary inside a black hole, in the bulk universe the event horizon of a 4D black hole would be a 3D object - a shape called a hypersphere. When Afshordi's team modelled the death of a 4D star, they found that the ejected material would form a 3D brane surrounding that 3D event horizon, and slowly expand. The authors postulate that the 3D Universe we live in might be just such a brane - and that we detect the brane's growth as cosmic expansion. "Astronomers measured that expansion and extrapolated back that the Universe must have begun with a Big Bang - but that is just a mirage," says Afshordi.
thinkahol *

Monkeys recognize themselves in the mirror, indicating self-awareness | KurzweilAI - 0 views

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    A study published Sept. 29 by Luis Populin, a professor of anatomy at the University of Wisconsin-Madison, shows that under specific conditions, a rhesus macaque monkey that normally would fail the "mark test" can still recognize itself in the mirror and perform actions that scientists would expect from animals that are self-aware.
Walid Damouny

Less is more in cancer imaging - 0 views

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    "When one diagnoses a cancer patient, it's important to gather as much information about that person as possible. But who would have thought an accurate diagnosis would depend on throwing some of that information away?"
Skeptical Debunker

'Hella' Proposed as Official Big Number - Yahoo! News - 0 views

  • To become official, "hella" would have to jump through quite a few bureaucratic hoops. It would have to pass through the Consultative Committee for Units (CCU), one of 10 advisory committees of the International Committee for Weights and Measures (CIPM). If the CCU recommends it the CIPM, that board must then decide whether to advance the cause to the General Conference on Weights and Measures (CGPM), the official authority that can make changes to the SI system. That international organization, based in France, includes members from 81 countries. "I think that for a number of reasons it's a long shot," said Ben Stein, a spokesperson for the National Institute of Standards and Technology, the U.S. organization that handles measurements. "The types of things they would consider are is it needed, does it add or reduce confusion, are the names consistent with other names associated with the prefixes?" Sendek argues that the name would honor the scientific contributions of Northern Californians, who have famously popularized the phrase "hella" to mean "a whole lot."
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    Soon the word "hella" may not be associated with California surfers as much as with scientists in lab coats. A physics student is petitioning to add "hella" to the International System of Units (SI) as the official designation of 10 to the 27th power, or a trillion trillions.
thinkahol *

YouTube - Sam Harris SALT - 2 views

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    December 9th, 02005 - Sam Harris"The View From The End Of The World"This is an audio only presentation. This talk took place in the Conference Center Golden Gate Room, San Francisco. Quote: With gentle demeanor and tight argument, Sam Harris carried an overflow audience into the core of one of the crucial issues of our time: What makes some religions lethal? How do they employ aggressive irrationality to justify threatening and controlling non-believers as well as believers? What should be our response? Harris began with Christianity. In the US, Christians use irrational arguments about a soul in the 150 cells of a 3-day old human embryo to block stem cell research that might alleviate the suffering of millions. In Africa, Catholic doctrine uses tortured logic to actively discourage the use of condoms in countries ravaged by AIDS. "This is genocidal stupidity," Harris said. Faith trumps rational argument. Common-sense ethical intuition is blinded by religious metaphysics. In the US, 22% of the population are CERTAIN that Jesus is coming back in the next 50 years, and another 22% think that it's likely. The good news of Christ's return, though, can only occur following desperately bad news. Mushroom clouds would be welcomed. "End time thinking," Harris said, "is fundamentally hostile to creating a sustainable future." Harris was particularly critical of religious moderates who give cover to the fundamentalists by not challenging them. The moderates say that all is justified because religion gives people meaning in their life. "But what would they say to a guy who believes there's a diamond the size of a refrigerator buried in his backyard? The guy digs out there every Sunday with his family, cherishing the meaningthe quest gives them." "I've read the books," Harris said. "God is not a moderate." The Bible gives strict instructions to kill various kinds of sinners, and their relatives, and on occasion their entire towns. Yet slavery is challenged nowhere in the New or
anonymous

Dairy Farming For The Farmers Willing To Earn More - 0 views

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    When dairy farming is involved, the farmers would tend to choose a particular kind of high milk producing species, which will allow them to attain more milk that what a regular mammal would.
Skeptical Debunker

New Rocket Engine Could Reach Mars in 40 Days - Yahoo! News - 0 views

  • A mission trajectory study estimated that a VASIMR-powered spacecraft could reach the red planet within 40 days if it had a 200 megawatt power source. That's 1,000 times more power than what the current VASIMR prototype will use, although Ad Astra says that VASIMR can scale up to higher power sources. The real problem rests with current limitations in space power sources. Glover estimates that the Mars mission scenario would need a power source that can produce one kilowatt (kW) of power per kilogram (kg) of mass, or else the spacecraft could never reach the speeds required for a quick trip. Existing power sources fall woefully short of that ideal. Solar panels have a mass to power ratio of 20 kg/kW. The Pentagon's DARPA science lab hopes to develop solar panels that can achieve 7 kg/KW, and stretched lens arrays might reach 3 kg/KW, Glover said. That's good enough for VASIMR to transport cargo around low-Earth orbit and to the moon, but not to fly humans to Mars. Ad Astra sees nuclear power as the likeliest power source for a VASIMR-powered Mars mission, but the nuclear reactor that could do the job remains just a concept on paper. The U.S. only ever launched one nuclear reactor into space back in 1965, and it achieved just 50 kg/kW.
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    Future Mars outposts or colonies may seem more distant than ever with NASA's exploration plans in flux, but the rocket technology that could someday propel a human mission to the red planet in as little as 40 days may already exist. A company founded by former NASA astronaut Franklin Chang-Diaz has been developing a new rocket engine that draws upon electric power and magnetic fields to channel superheated plasma out the back. That stream of plasma generates steady, efficient thrust that uses low amounts of propellant and builds up speed over time. "People have known for a long time, even back in the '50s, that electric propulsion would be needed for serious exploration of Mars," said Tim Glover, director of development at the Ad Astra Rocket Company.
Sonny Cher

Party All You Want After Work - 1 views

My current job ends at 10 in the evening. However, it is my friend's homecoming party and he invited me to come by after work. I knew I would definitely feel exhausted after work and I am afraid I ...

stimulants

started by Sonny Cher on 17 May 11 no follow-up yet
Sonny Cher

Party All You Want After Work - 1 views

My current job ends at 10 in the evening. However, it is my friend's homecoming party and he invited me to come by after work. I knew I would definitely feel exhausted after work and I am afraid I ...

stimulants

started by Sonny Cher on 20 Apr 11 no follow-up yet
Janos Haits

Synote Home Page - 0 views

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    Synote makes multimedia resources such as video and audio easier to access, search, manage, and exploit. Learners, teachers and other users can create notes, bookmarks, tags, links, images and text captions synchronised to any part of a recording, such as a lecture. Imagine how difficult it would be to use a textbook if it had no contents page, index or page numbers. Synote actually provides the way to find or associate notes with a particular part of a recording,i.e. the media fragments.
Erich Feldmeier

Ben Young Landis How Twitter Amplifies Your Reach: Example from the "School o... - 0 views

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    "My link was shared by Bora Zivkovic, whose network is immense. And in turn, the link was shared by Twitter users in Greece, Germany, Belgium and throughout the United States. In the end, the blogpost wound up with 109 readers on January 22nd - with about 50 via Twitter, 26 via Facebook, and others via LinkedIn and elsewhere. When each person shared the link with her or his network, the momentum is carried forward, pushing out to new networks and new degrees of separation. Social sharing is a bit like the emails you would get forwarded by your relatives (you know, those emails). The deeper you scroll down the thread, the less sender names you recognize. But with Twitter, and using analytics like WordPress or Google, you can actually trace how a little link travels through different social networks, and eventually back to your website. Also, because many people embed a small bio or website link in their Twitter profile, I can quickly see who has retweeted and read my link. I can read their tweets to get an idea of their profession and passions,"
Erich Feldmeier

Do-it-yourself biotech: Ellen Jorgensen at TEDGlobal 2012 - 0 views

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    "t turns out that all over the world there were people trying to do similar things - opening biohacker spaces. Three years later, this is a thriving global community. Each lab has a flavor of where it was created - people work together or alone, in big cities or small villages, they build things and take them apart, and do much, much more. The spirit is open. But what about the dark side? What about biosafety, biosecurity? The minute Genspace opened their doors, journalists called. And the only question they wanted to ask was, "Would this lab create the next Frankenstein?" The press was overestimating their capabilities - and underestimating their ethic"
Erich Feldmeier

Science: It's a Girl Thing ! - YouTube - 0 views

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    "This Disgraceful video was published by the European Commission for a campaign designed to attract more women to a career in science. The commission said that the video had to "speak their language to get their attention" and that it was intended to be "fun, catchy" and strike a chord with young people. "I would encourage everyone to have a look at the wider campaign and the many videos already online of female researchers talking about their jobs and lives," The original video was taken down after it received so many negative comments. "
Ilmar Tehnas

How deep must life hide to be safe on Europa? - 2 views

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    If there is organic life deep under the ice on Europa, why would we need to disturb it at all? Potential source of unknown viruses etc. Risks of releasing something are low I guess, but the assumption that whatever may be there needs Earth-like conditions to survive and multiply is dangerous.
Erich Feldmeier

Noise and Signal - Nassim Taleb | Farnam Street - 0 views

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    "There is a biological story with information. I have been repeating that in a natural environment, a stressor is information. So too much information would be too much stress, exceeding the threshold of antifragility. In medicine, we are discovering the healing powers of fasting, as the avoidance of too much hormonal rushes that come with the ingestion of food. Hormones convey information to the different parts of our system and too much of it confuses our biology. Here again, as with the story of the news received at too high a frequency, too much information becomes harmful. And in Chapter x (on ethics) I will show how too much data (particularly when sterile) causes statistics to be completely meaningless. Now let's add the psychological to this: we are not made to understand the point, so we overreact emotionally to noise. The best solution is to only look at very large changes in data or conditions, never small ones"
Erich Feldmeier

Zen Faulkes: NeuroDojo: A patent clerk's pay, or, why is science so expensive? - 0 views

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    "We often think that the limiting factors to doing science are intellectual or technological. There are many unsolved scientific problems that we know how to answer. We aren't waiting for any conceptual breakthroughs or new technologies. We're waiting for people. We need "hands at the bench" to put in the time to collect the data. The instabilities of salary is a major limiting factor for science and is probably a big reason a lot of them get out of science: they don't see a way to pay the bills. Creating permanent, stable positions for scientists would release a lot of scientific research."
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