Dino Blood?

24th July 2007 Season 2 Episode 5

A paleobiologist has discovered preserved blood vessels and red blood cells in a 68-million-year-old dinosaur bone.Epigenetics: It seems that diet and lifestyle actually change the expression of our genes.Kryptos: A sculpture called Kryptos in the courtyard of CIA headquarters, contains a code that has yet to be fully broken.Profile: Arlie Petters: A look at Duke University Professor of Mathematics and Physics, and his research in the field of gravitational lensing.

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Season 3 · Episode 1

Dark Matter, Mice, Crowd Wisdom

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.

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