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In the sweltering heat of an early July afternoon, Michael R. Waters clambers down into a shadowy pit where a small hive of excavators edge their trowels into an ancient floodplain. A murmur rises from the crew, and one of the diggers gives Waters, an archaeologist at the Center for the Study of the First Americans at Texas A&M University, a dirt-smeared fragment of blue-gray stone called chert

Gianni Agnelli, the late Italian industrialist, was renowned for his distinctive sense of style, and he is still an important inspiration for countless tailors, including a young Italian named Valentino Ricci.

While working at Facebook in 2009, Adam D'Angelo and Charlie Cheever had a question: Why isn't there a place on the Internet where a question can be answered by someone who actually knows the answer? That question led the pair to start Quora , a Q&A website that allows users to share knowledge. You can pose a question, answer a question, and edit others' answers

MINNEAPOLIS--It’s a great irony of paleoanthropology that for all the insights scientists have been able to glean from the fossil record about our early ancestors, the australopithecines (Lucy and her kin), they have precious little to document the origin of our own genus, Homo. They know that Homo descended from one of those australopithecine species, and that over the course of that transition our ancestors evolved from chimp-size creatures with short legs and small brains into tall humans with long legs and large brains, among other hallmark traits