Scientific American FrontiersTV Show
Science, technology and nature are examined with insight, humor and an eye on the practical, with smartly paced reports on such subjects as the big-bang theory, robots, the relationship between stress and illness, and whether we are alone in the universe (more…)
Season 14, Episode 6 Coming into America
First Aired: July 20, 2004
“Coming into America” explores how prehistoric immigrants (host Alan Alda calls them “the true American pioneers”) might have arrived here---up to 20,000 years ago. Conventional wisdom has been that the “Clovis people” made their way down from Siberia about 13,000 years ago and spread out. But archaeologists interviewed point to artifacts in various places around the U.S. that are far older---and there's evidence that the ice sheets remained in place longer than previously thought---casting doubt on that theory.
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