Big Picture Science – Life Back Then: Lorna O’Brien

by Gary Niederhoff on November 4, 2013

Life Back Then: Lorna O’Brien
Part 2 of Life Back Then, featuring Lorna O’Brien, evolutionary biologist, University of Toronto, on the fossilized treasure trove of the Cambrian explosion, the Burgess Shale.
(TRT 7:51)

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