Science Feb 08 Watch How Tough Is it to Build a Dirty Bomb? Science correspondent Miles O'Brien examines the threat that radioactive "dirty bombs"could pose to cities in the U.S., and what's being done to prevent a radiological attack from happening.
Science Jan 19 Watch NOVA’s ‘Making Stuff’ Explores Spinning of Steel-Strength Spider Silk NOVA and New York Times technology columnist David Pogue look at innovative technologies for stronger, sleeker future products, including Kevlar, nanotubes and "invisibility cloaks."…