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| Tiny mountainous region in Siberia may have been genetic source of earliest Native Americans Posted: 26 Jan 2012 09:36 AM PST A tiny mountainous region in southern Siberia may have been the genetic source of the earliest Native Americans, according to new research. |
| Does antimatter weigh more, less or the same as matter? Posted: 26 Jan 2012 08:59 AM PST Does antimatter weigh more than matter? Physicists want to know. Their finding could explain why the universe seems to have no antimatter and why it is expanding at an ever increasing rate. In the lab, the researchers took the first step towards measuring the free fall of positronium -- a bound state between a positron and an electron. They separated the positron from the electron long enough to measure gravity's effect on them. |
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