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Cooking is something we all take for granted but a new theory suggests that if we had not learned to cook food, not only would we still look like chimps but, like them, we would also be compelled to spend most of the day chewing.

2010-03-02

 cooking food human evolution energy tooth toread
A zebra at Zurich Zoo appeared to be staring into the jaws of death when visitors saw it nose to nose with an open-mouthed hippopotamus. But the hippo had no intention of having the zebra for lunch - it was having its teeth cleaned.

2010-03-12

 hippopotamus zebra tooth clean