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5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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ScienceShot: Dark Matter? Keep Looking
13 April 2011 8:00 pm
Once again, physicists have not found particles of dark matter—the mysterious stuff whose gravity holds galaxies together. Researchers working with the XENON100 particle detector in the subterranean Gran Sasso National Laboratory in central Italy report today that 100 days' worth of data taking turned up three events that could be dark matter particles smacking nuclei in the 62 kilograms of liquid xenon in their detector. But the scientists expect roughly two false positives from ordinary particles, so the chances are that all three events are "background," the team explains in a paper submitted to Physical Review Letters. The results show that other claimed dark-matter sightings were also spurious, the authors say. Physicists remain hopeful that bigger detectors will provide proof positive of dark-matter particles within the next few years.
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