When Anthropologists Louis Leakey and his wife Mary began their search for man's origins in the 1930s, they paused briefly in a dry, remote region of Tanzania called Laetolil (after the Masai name for a hardy regional flower). The area's volcanic ash yielded fossils of many extinct creatures, but none that were even vaguely human. So the Leakeys continued their work at a more promising site, some 25 miles to the north in neighboring Kenya, called Olduvai Gorge. There they found the remains of hominid creatures that pushed man's lineage back to some...
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