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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
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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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