NOVA scienceNOW (2005)

Season 4 Episode 3

Marathon Mouse/Dinosaur Plague/Franklin Chang-Díaz/Space Storms

0.03 / Jul / 2009•m

Watch how an "exercise pill" turns couch-potato mice into athletes, explore a controversial new theory of what killed the dinosaurs, meet the first Latino-American astronaut, and find out why the beautiful northern lights signal a threat to our electronic society.