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DAVID GRINSPOON

A photograph of David Grinspoon wearing a fedora

Earth in human hands

Astrobiologist David Grinspoon discusses growing up with Carl Sagan, his residency at the National Library of Congress, the Anthropocene, climate change, and his book, "Earth in Human Hands"​
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MICHELLE THALLER

Official portrait of Michelle Thaller at NASA Headquarters in Washington, DC on Tuesday, Aug. 2, 2016. Photo Credit: (NASA/Joel Kowsky)

ORBITAL PATH

NASA Deputy of Communications Michelle Thaller discusses Sci-Comm and her show, Orbital Path
NASA

JOE NICKELL

Joe Nickell smiling and wearing a black suit jacket with black turtleneck. (JoeNickell.com)

COMMITTEE FOR SKEPTICAL INQUIRY

CSI Fellow Joe Nickell joins the program to talk about his exploits in paranormal research, his time as a civil rights worker in rural Georgia, and debunking popular extraordinary claims.
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