NOVA scienceNOW
Season 3
Episode 1: Dark Matter, Mice, Crowd Wisdom
TV-GJun 25, 2008
Dark Matter - Turns out most of the universe is held together by a mysterious, invisible substance.Of Mice and Memory - Mice placed in enriched environments can recover lost memories, giving hope to those who study Alzheimer's.Profile: Hany Farid - This self-proclaimed "accidental scientist" is a digital detective inventing new ways to tell if photos have been faked.Wisdom of the Crowds - Ask enough people to estimate something, and their combined guesses will get you surprisingly close to the right answer.