Season 21, Episode 8
Season 21 Episode 2108 | 28m 24s
Murres & Eagles - Ocean-going birds called common murres are abandoning some of their breeding grounds. Wind and Bats - What we learn about bats now should serve as a lesson as wind power expands. Geocaching - High tech navigational techniques combined with age old treasure hunting.
Aired: 02/03/10Video has closed captioning.