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b'What\\u2019s past is prologue. For centuries, researchers have studied buried evidence \\u2013 bones, teeth, or artifacts \\u2013 to learn about murky human history, or even to investigate vanished species. But today\\u2019s hi-tech forensics allow us to analyze samples dug from the ground faster and at a far more sophisticated level.\\nFirst, the discovery of an unknown species of dinosaur that changes our understanding of the bizarre beasts that once roamed North America.\\nAnd then some history that\\u2019s more recent: two projects that use the tools of modern chemistry and anthropology to deepen our understanding of the slave trade.\\nPlus, an anthropologist on an evolutionary habit that is strange to some, but nonetheless common all over the world: the urge to eat dirt.\\nGuests:\\n\\u2022\\xa0\\xa0Scott Sampson \\u2013 Paleontologist at the Denver Museum of Nature and Science and author of Dinosaur Odyssey: Fossil Threads in the Web of Life\\n\\u2022\\xa0\\xa0Fatimah Jackson \\u2013 Biologist, anthropologist, University of North Carolina, Chapel Hill, director of the Cobb Lab at Howard University, and advisor to EUROTAST\\n\\u2022\\xa0\\xa0Joseph Jones \\u2013 Biological anthropologist, visiting assistant professor at the College of William and Mary, researcher on the African Burial Ground Project\\n\\u2022\\xa0\\xa0Sera Young \\u2013 Research scientist, division of Nutritional Sciences, Cornell University, and author of Craving Earth: Understanding Pica\\u2014the Urge to Eat Clay, Starch, Ice, and Chalk\\n\\xa0\\nFirst released August 12, 2013.\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'