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| 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.  |
| LED lights point shoppers in the right direction Posted: 26 Jan 2012 08:59 AM PST Looking for an item in a large department store or mall can be like searching for a needle in a haystack, but that could change thanks to a hybrid location-identification system that uses radio frequency transmitters and overhead LED lights, suggested by a team of researchers.  |
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