Marathon Mouse, Dinosaur Plague, Franklin Chang-Diaz,...
Clip: Season 4 Episode 3 | 52m 21s | Video has closed captioning.
Season 4: Episode 3
Aired: 07/14/09
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Problems Playing Video? | Closed Captioning
Clip: Season 4 Episode 3 | 52m 21s | Video has closed captioning.
Season 4: Episode 3
Aired: 07/14/09
Problems Playing Video? | Closed Captioning