The Sixth Extinction, plus New Fossil Bed in Kootenay National Park, Dimetrodon With Steak-knife Teeth, and more - 2014/02/15

Quirks and Quarks

The Sixth Extinction, Quirks Question Period - Upside Down Nuthatches, Ancient Fossil Motherlode, Dimetrodon With Steak-knife Teeth, World's Fastest Glacier.

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