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5 December 2013 11:26 am ,
Vol. 342 ,
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,...
Since arriving on the island of Guam in the 1940s, the brown tree snake ( Boiga irregularis ) has extirpated native...
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...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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ScienceShot: Neutrino Observatory Picks Up Cosmic Rays
30 July 2010 5:00 pm
Next year, scientists will cut the ribbon on IceCube, a neutrino observatory consisting of strings of detectors buried deep in Antarctic ice. But eager researchers have already used the unfinished detector to search for a different type of particle from space, called cosmic rays—mostly energetic protons and helium nuclei of cosmic origin. Both cosmic rays and neutrinos create the same particles—muons—when they collide with matter, and muons are what the observatory is designed to detect. Only neutrinos, however, can travel through Earth. So muons that come from below are from neutrino collisions inside the ice, whereas the vast majority of muons that come from above are created by cosmic ray collisions in Earth's atmosphere. Next month in The Astrophysical Journal Letters, researchers report that they used IceCube to study a longstanding puzzle: whether the distribution of cosmic ray arrivals is uneven across the southern sky, as scientists have previously observed in the northern hemisphere. Indeed, the team found, IceCube detected a disproportionate number of cosmic rays arriving from some parts of the sky. But the reason for this uneven distribution remains unclear.
See more ScienceShots.