Episode 12 - The Geologic Time Scale

This episode is about the history of the earth, and how we compile all that we know about the ancient past in the great Geologic Time Scale.   

In the news: the shapes of bird eggs, very ancient amphibians, more dinosaur faces, and the history of hippos.

Time markers:
Intro & Announcements: 00:00:00
News: 00:03:00
Main discussion: 00:32:00
Patron announcements & question: 01:32:00

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http://commondescentpodcast.wordpress.com/

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The Podcast music is “On the Origin of Species” by Protodome.
More music like this at http://ocremix.org.