Mind lags body
I'm 77 and, like many people my age, tend to stoop rather than...
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Today on 51动漫
All the latest from newscientist.com: supernova fading from view, measure your Machiavellian potential, drunken chimps, trail-blazing ants, and more
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Environment
Polar bear caught eating dolphins and freezing the leftovers
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Today on 51动漫
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Earth
Serengeti snaps capture secret lives of animals
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Today on 51动漫
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