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meanwhile also work

meanwhile also work

“Your head works with your arms to keep you from twisting and swaying in midstride,” Dr.

Lieberman said. The arms,  as a counterbalance to keep the head aligned.

“That’s how bipeds solved the problem of how to stabilize a head with a movable neck. It’s yetanother feature of human evolution that only makes sense in terms of running.”

But the big mystery continued to be food. Judging by the Godzilla-like growth of our heads,Lieberman could pinpoint the exact moment when the caveman menu changed: it had to be twomillion years ago, when apelike Australopithecus—with his tiny brain, giant jaw, and billy-goatdiet of tough, fibrous plants—evolved into Homo erectus, our slim, long-legged ancestor with thebig head and small, tearing teeth perfectly suited for raw flesh and soft fruits. Only one thing couldhave sparked such a dramatic makeover: a diet no primate had ever eaten before, featuring areliable supply of meat, with its high concentrations of calories, fat, and protein with her, he would sanction everything at oncehe answered..

“So where the *** did they get it?” Lieberman asks, with all the gusto of a man who’s notsqueamish about hacking into goats with a rock. “The bow and arrow is twenty thousand years old.

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