Watch NOVAs

NOVA scienceNOW Episode 17 (June 2009)

Visit a factory that grows diamonds, learn how experts identified the source of the 2001 anthrax attacks, hear amazing results from pitch-correction software, and meet a computer scientist who wants to harness the brainpower of 500 million people. Watch now (47 mins.)

Doctors' Diaries (Apr. 2009)

Seven doctors, 21 years... Saving lives is only part of the story. Watch now (50 mins.)

Megabeasts' Sudden Death (Mar. 2009)

Scientists propose a radical new idea of what killed off mammoths and other large animals at the end of the Ice Age. Watch now (50 mins.)

Extreme Ice (Mar. 2009)

An acclaimed photographer teams up with scientists to document the runaway melting of arctic glaciers. Watch now (50 mins.)

Rat Attack (Feb. 2009)

Why do huge swarms of rats overrun a bamboo forest in India once every half-century? Watch now (50 mins.)