NOVA scienceNOW S04E03 HDTV XviD-FQM

Host and Astrophysicist Neil deGrasse Tyson explores two drugs that may help kids with muscular dystrophy and the frail elderly renowned paleontologist George Poinar, who discovered multiple clues to parasitic pandemics talks about the demise of the dinosaurs rocket scientist and astronaut Franklin Chang-Diaz is profiled and, the beauty–and dangers of the northern lights.