Nature
Dogs That Changed the World (Part 1) - Preview
Airs Wednesday, October 5, 2011 at 8:00 p.m. ET/PT. Check your local listings.
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Episode 1: Birth and Rebirth Preview
Spring is a time of birth and rebirth for plants and animals across the country.
Nature
American Spring LIVE ~ Episode 3: Connections Preview
See first-hand how the changing climate affects crucial connections in nature.
