ScienceDaily: Top Science News |
- Russian asteroid strike: Numerous injuries, significant damage
- Supernova remnants produce cosmic rays
- Clues to the mysterious origin of cosmic rays
- Humans and chimps share genetic strategy in battle against pathogens
| Russian asteroid strike: Numerous injuries, significant damage Posted: 15 Feb 2013 04:21 PM PST A space rock a few metres across exploded in Earth's atmosphere above the city of Chelyabinsk, Russia today (Feb. 15, 2013) at about 03:15 GMT. The numerous injuries and significant damage remind us that what happens in space can affect us all. |
| Supernova remnants produce cosmic rays Posted: 14 Feb 2013 04:41 PM PST A new study reveals the first clear-cut evidence the expanding debris of exploded stars produces some of the fastest-moving matter in the universe. This discovery is a major step toward understanding the origin of cosmic rays, one of Fermi's primary mission goals. |
| Clues to the mysterious origin of cosmic rays Posted: 14 Feb 2013 11:18 AM PST Very detailed new observations of the remains of a thousand-year-old supernova have revealed clues to the origins of cosmic rays. For the first time the observations suggest the presence of fast-moving particles in the supernova remnant that could be the precursors of such cosmic rays. |
| Humans and chimps share genetic strategy in battle against pathogens Posted: 14 Feb 2013 11:16 AM PST A search for long-lived balancing selection has found at least six regions of the genome where humans and chimpanzees share a combination of genetic variants. These human genetic variation dates back to a common ancestor with chimpanzees millions of years ago, before the species split. |
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