NOVA scienceNOW

Season 2 Episode 5

NOVA scienceNOW - July 24, 2007

Aired Tuesday 8:00 PM Jul 24, 2007 on PBS
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Episode Summary

NOVA scienceNOW - July 24, 2007

Dino Blood?: 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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