Terra Sapiens: The Human Chapter in the History of Earth

submitted by Marvin's Underground Evening Lectures on 10/06/18 1

David Grinspoon examines choices facing humanity as we enter the Anthropocene Era, the epoch when human activities are becoming a defining characteristic of the physical nature and functioning of Earth. Speaker Biography: David Grinspoon is the inaugural Baruch S. Blumberg NASA/LC Chair in Astrobiology. For transcript, captions and more information, visit www.loc.gov/today/cyberlc/feature_wdesc.php?rec=6183

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