How Long Is a Year? Is the Earth Slowing Down? And Other Questions About Time

How long is a year? It’s not a trick question—biologist Neil Shubin, the author of the new book The Universe Within: Discovering the Common History of Rocks, Planets, and People, tells the story of how coral reefs provide evidence that epochs ago, there were more days in a year.

Neil Shubin

Published Jan. 6 2013 12:00AM EST 

Neil Shubin

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