'Cosmos' Looks Back At Earth's Extinction Events | Preview Clip

Host Neil deGrasse Tyson visits the grand 'Hall of Extinction'. The all-new "Some of the Things That Molecules Do" episode of 'Cosmos: A Spacetime Odyssey' airs Sunday, March 16 on Fox and Monday, March 17th on Nat Geo.
credit : Courtesy of Fox Broadcasting
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