Are We Alone – Alien Invasion: Planetary Protection

by Gary Niederhoff on June 20, 2011

Part 6 of Alien Invasion, featuring Margaret McLean, director of bioethics at the Markkula Center for Ethics, Santa Clara University, and Margaret Race, biologist and Principal Investigator at the SETI Institute, on the implications of extra terrestrial contamination.
(TRT 11:07)

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