In the following video excerpt, NASA celebrates the 50th Anniversary of its Exobiology program. The opening keynote speakers were Gaia theory founders James Lovelock and Lynn Margulis, and near the climax of Margulis' speech, she cites a lengthy passage, (seemingly attributed to Lowman's book Exploring Earth, Exploring Space), from Life's Tectonics (MIT Press, 2011), co-authored by Lowman and Currier.


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