Science: Lucy Gets a Younger Sister

New discoveries may revise views of human evolution

"Whoa. This is a hominid," crowed Anthropologist Tim White when he spotted the first bone fragment, a portion of an elbow, lying on a layer of sand. Looking down, Expedition Leader Donald Johanson shouted, "There's part of a humerus right next to it!" That July 1986 find in Tanzania's Olduvai Gorge marked the beginning of a startling discovery that was formally unveiled last week by White and Johanson. The team of ten U.S. and Tanzanian scientists unearthed 302 fossil bones and teeth that have yielded a more complete picture of modern humans' earliest direct ancestor, Homo habilis. The new material could...

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