Life & Evolution

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parakeet

A yawn can spread from parakeet to parakeet, even when the two aren't nuzzling noses.

Manatee near Crystal River, Fla.

MAKE WAY  Tourists can visit sea cows in Crystal River, Fla., but they’ll need to mind their manatee manners.

Mammoth calf mummy

LIFE FROM DEATH  Even well-preserved mammoth remains, such as this calf mummy found in 2007, won’t yield enough DNA to make a clone. But there are other ways to bring mammoths back, according to evolutionary biologist Beth Shapiro.

Life & Evolution

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