NOVA scienceNOW Marathon Mouse, Dinosaur Plague, Franklin Chang-Diaz, Space Storms
Season 4: Episode 3 Details
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Marathon Mouse
Test out some mouse-racing experiments to learn how drugs that mimic exercise were discovered.
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Dinosaur Plague
See a gallery of fossil animals and plants trapped in amber, and hear more from George Poinar.
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Profile: Franklin Chang-Diaz
Chang-Diaz answers viewer questions, and more.
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Space Storms
See a gallery of the dazzling Northern Lights and hear their eerie sounds.
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