Ardi’s Secret: Did Early Humans Start Walking for Sex?

From National Geographic News

Jamie Shreeve
Science editor, National Geographic magazine

October 1, 2009

The big news from the journal Science today is the discovery of the oldest human skeleton—a small-brained, 110-pound (50-kilogram) female of the species Ardipithecus ramidus, nicknamed “Ardi.” She lived in what is now Ethiopia 4.4 million years ago, which makes her over a million years older than the famous Lucy fossil, found in the same region 35 years ago.

(Full story: “Oldest ‘Human’ Skeleton Found—Disproves ‘Missing Link.'”)

Buried among the slew of papers about the new find is one about the creature’s sex life. It makes fascinating reading, especially if you like learning why human females don’t know when they are ovulating, and men lack the clacker-sized testicles and bristly penises sported by chimpanzees.

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