Three weeks ago, with much fanfare, a team of scientists unveiled the fossil skeleton of Ardi, a 4-foot-tall female primate who lived and died 4.4 million years ago in what is now Ethiopia. According to her discoverers, Ardi - short for Ardipithecus ramidus, her species - is our oldest known ancestor. She predated Lucy, the fossilized Australopithecus afarensis that previously ... (Full article: 2484 words)

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