Watch as researchers show off a new exercise pill which changes couch potato rodents into champion caliber runners; a controversial theory over the death of the dinosaurs is sparked by insects caught in amber; then a profile of Franklin Chang-Díaz, the first Latino-American astronaut who is also a scientist designing a new generation of plasma-powered space vehicles; and lastly, behind the aurora borealis are space storms which could end life on earth that could turn the lights off here on Earth.