How Beavers Build Dams | Leave it to Beavers | PBS

Watch the full-length program at http://video.pbs.org/video/2365243455/?utm_source=youtubeutm_medium=pbsofficialutm_campaign=naat_covefullprogram (US Only) "Leave it to Beavers" on NATURE tells the story of beavers in North America -- their history, their near extinction, and their current comeback as modern day eco-heroes. The program airs Wednesday, May 14 at 8 p.m. (ET) on PBS (check local listings). After the broadcast, the episode will be available for online streaming at pbs.org/nature.

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