They are capable of delicate surgery, creating beautiful works of art, and comforting someone feeling down, but according to a new study your hands evolved to smash someone in the face. From the article: "Human hands evolved so that men could make fists and fight, and not just for manual dexterity, new research finds. The study, published in the Journal of Experimental Biology, adds to a growing body of evidence that humans are among the most aggressive and violent animals on the planet. 'With the notable exception of bonobos, great apes are a relatively aggressive group of mammals,' lead author David Carrier told Discovery News. 'Although some primatologists may argue that chimpanzees are the most aggressive apes, I think the evidence suggests that humans are substantially more violent.''"
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alphadogg writes "Researchers at MIT and other institutions have demonstrated a new type of magnetism, only the third kind ever found, and it may find its way into future communications, computing and data storage technologies. Working with a tiny crystal of a rare mineral that took 10 months to make, the researchers for the first time have demonstrated a magnetic state called a QSL (quantum spin liquid), according to MIT physics professor Young Lee. He is the lead author of a paper on their findings, which is set to be published in the journal Nature this week (abstract). Theorists had said QSLs might exist, but one had never been demonstrated before. 'We think it's pretty important,' Lee said, adding that he would let his peers be the ultimate judges."
skade88 writes "Do you remember those large TI-8X line of calculators with a BW display from when you were growing up and learning all about math? Yeah well, you can still get them because TI has yet to update or change their line of TI-8X calculators from their 96x64 display, processors designed in the 1980s with just a few kilobytes of user accessible memory. They still cost in the $100.00 to $150.00 range. That is all about to change now that the TI-8X line of calculators is 22 years old. Their new TI-84+C-Silver edition will come with a 320x240 16-bit color display, 3.5MB of flash ROM, and 21KB of RAM. Ars has a good preview of the device along with speculation on why it took so so so very long for TI to finally bring calculators up to a level of technology that could have been delivered a decade ago."Last month some photos and a few details of the new TI-84+C were leaked.
hypnosec writes "By using liquid metal researchers have created wires that can stretch up to eight times their original length while retaining their conduction properties. Scientists over at North Carolina State University made the stretchable wires by filling in a tube made out of an extremely elastic polymer with gallium and an indium liquid metal alloy."
Dishwasha writes "A fellow co-worker of mine turned me on to CubeSat; apparently there are commercial space companies that will launch CubeSat systems from their payload for a modest fee. Is anybody in the /. community involved in amateur microsatellite systems? How would I go about getting involved at an amateur level? Are there any amateur user groups and meetups I can join? I have limited background in all the prerequisites but am eager to learn even if it takes a lifetime. Any links to design and engineering of satellites would be appreciated."
An anonymous reader send this quote from The Star: "The idea that intelligence can be measured by a single number — your IQ — is wrong, according to a recent study led by researchers at the University of Western Ontario (abstract). The study, published in the journal Neuron on Wednesday, involved 100,000 participants around the world taking 12 cognitive tests, with a smaller sample of the group undergoing simultaneous brain-scan testing. 'When we looked at the data, the bottom line is the whole concept of IQ — or of you having a higher IQ than me — is a myth,' said Dr. Adrian Owen, the study’s senior investigator... 'There is no such thing as a single measure of IQ or a measure of general intelligence.'"
MrSeb writes "If you've not been tracking the thorium hype, you might be interested to learn that the benefits liquid fluoride thorium reactors (LFTRs) have over light water uranium reactors (LWRs) are compelling. Alvin Weinberg, who invented both, favored the LFTR for civilian power since its failures (when they happened) were considerably less dramatic — a catastrophic depressurization of radioactive steam, like occurred at Chernobyl in 1986, simply wouldn't be possible. Since the technical hurdles to building LFTRs and handling their byproducts are in theory no more challenging, one might ask — where are they? It turns out that a bunch of U.S. startups are investigating the modern-day viability of thorium power, and countries like India and China have serious, governmental efforts to use LFTRs. Is thorium power finally ready for prime time?"
ATKeiper writes "A number of companies have announced plans in the last couple of years to undertake private development of space. There are asteroid-mining proposals backed by Larry Page and Eric Schmidt, various moon-mining proposals, and, announced just this month, a proposed moon-tourism venture. But all of these — especially the efforts to mine resources in space — are hampered by the fact that existing treaties, like the Outer Space Treaty, seem to prohibit private ownership of space resources. A new essay in The New Atlantis revisits the debates about property rights in space and examines a proposal that could resolve the stickiest treaty problems and make it possible to stake claims in space."
New submitter seepho writes "Senator Jay Rockefeller (D-WV) has introduced a bill directing the National Academy of Sciences to lead an investigation to determine what impact violent video games have on children. Senator Rockefeller commented, 'Recent court decisions demonstrate that some people still do not get it. They believe that violent video games are no more dangerous to young minds than classic literature or Saturday morning cartoons. Parents, pediatricians, and psychologists know better. These court decisions show we need to do more and explore ways Congress can lay additional groundwork on this issue. This report will be a critical resource in this process.'" This legislation was prompted by reports that Sandy Hook shooter Adam Lanza was a gamer. A draft of the bill is available online.
OakDragon writes "A newly discovered species of spider — apparently of the genus Cyclosa — has been discovered in the Peruvian Amazon. The spider builds an elaborate decoy out of web, twigs, and other scraps, which appears to be a much larger spider. The spider will even cause the decoy to move, marionette-style, by shaking the web."
sciencehabit writes "Astronomers have discovered what may be five planets orbiting Tau Ceti, the closest single star beyond our solar system whose temperature and luminosity nearly match the sun's. If the planets are there, one of them is about the right distance from the star to sport mild temperatures, oceans of liquid water, and even life (paper)."
astroengine writes "As the Cassini mission continues to orbit the ringed gas giant Saturn, it's hard to imagine what magnificent view the NASA spacecraft will show us next. Today, however, is one for the history books. As a very special Christmas holiday treat, the Cassini Imaging Central Laboratory for Operations (CICLOPS) team have processed a magnificent view of Saturn that is rarely seen — a portrait from the dark side of the planet."
pigrabbitbear writes "Cars, once again, are killing us. They're killing us in crashes and accidents, yes, and they're encouraging us to grow obese and then killing us a little more slowly. But, more than ever before, they're killing us with their pollution. Particulate air pollution, along with obesity, is now the two fastest-growing causes of death in the world, according to a new study published in the Lancet. The study found that in 2010, 3.2 million people died prematurely from the air pollution – particularly the sooty kind that spews from the exhaust pipes of cars and trucks. And of those untimely deaths, 2.1 million were in Asia, where a boom in car use has choked the streets of India and China's fast-expanding cities with smog."
An anonymous reader writes "A 2011 ProPublica series found that the TSA had glossed over the small cancer risk posed by its X-ray body scanners at airports across the country. While countries in Europe have long prohibited the scanners, the TSA is just now getting around to studying the health effects." I'm not worried; the posters and recorded announcements at the airport say these scanners raise no health concerns.
SchrodingerZ writes "After their yearlong mission to map the Moon's gravitational field, twin probes Ebb and Flow crashed into the lunar surface, ending the GRAIL mission. The crashes were controlled events, each impacting 30 seconds apart from each other. The twin spacecraft were running low on maneuvering fuel and NASA, not wanting the craft to fall on historical sites such as the Apollo landing sites, redirected their flight patterns to impart the far (dark) side of the moon. Their impact sites were named after Sally Ride, the first American woman in space. 'During the news conference last week, Maria T. Zuber, the principal investigator, said the probes would be crashing into a "non-sunlit" part of the surface.' When the site becomes sunlit again in several weeks, the Lunar Reconnaissance Orbiter will attempt to take pictures of the craters the probes undoubtedly made in the lunar soil."
gbrumfiel writes "The world's most powerful particle collider ended an epic proton run yesterday morning, and researchers are already looking to the future. They want to build a 31-kilometer, multi-billion-dollar International Linear Collider (ILC) to study the recently-discovered Higgs boson in more detail and to look for new things as well. Japan has recently emerged as the front-runner to host the new collider. The Liberal Democratic Party, which won this weekend's elections, actually support the ILC in its party platform. But it's not yet clear whether real money will be forthcoming, or whether European and American physicists will back a Japanese bid. What do Slashdotters think? Does particle physics need a new collider? Should it go to Japan?"
An anonymous reader writes with an excerpt from Medical Daily about a new theory for what triggered the "Great Dying: " "Researchers believe that they may finally know why the event occurred, but the theory is not without controversy. There are several theories, including the possibility of a meteorite hitting the planet. Previously, most researchers believed that the Permian mass extinction was a result of a series of volcanic eruptions in what is now Siberia. ... However, Daniel Rothman from the Massachusetts Institute of Technology is floating around a different theory. As he presented in a meeting for the American Geophysical Union, he believes that the mass extinction could have been caused by something much smaller. His theory is that the extinction was caused by a single strain of bacteria."
coondoggie writes "Insidious unknown planets lurking behind the sun ready to slam into Earth, supernova set to engulf the planet and giant, unseen asteroids screaming toward our globe are all theories espoused across the Internet as to how we will meet our demise on 12/21/2012. Do any of these theories even remotely hold out a scintilla of evidence they could happen? Not even remotely if you look at the material NASA has put out which pretty much debunks any and all of the notions being floated in across the cybersphere."
An anonymous reader writes "While fossils have long shown that limbs evolved from fins, scientists have shown live in the laboratory how the transition may have happened. Researchers said that the new study published in the journal Developmental Cell offers evidence revealing that the development of hands and feet occurred through the acquisition of new DNA elements capable of activating specific genes."
Zothecula writes "China has now joined the very select group of countries to have succeeded in carrying out an interplanetary probe mission. According to reports from China's official news agency Xinhua, the Chang'E 2 probe passed a mere 3.2 km (2 miles) from the near-Earth asteroid Toutatis at 8:30:09 GMT on December 13, making it the closest asteroid flyby to date ... and resulting in some remarkable photographs."