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S3:E10 T-Rex Blood, Epigenetics, Kryptos
First Aired: August 20, 2008
T-Rex Blood? - Preserved soft tissue, including possible blood vessels and red blood cells, are turning up in dinosaur fossils. Epigenetics - Our lifestyles can change the way our genes are expressed, leading even identical twins to become distinct as they age. Kryptos - A coded sculpture at CIA headquarters has yet to be fully broken. Profile: Arlie Petters - A boy from a rural village in Belize grows up to become a world-class mathematician and cosmologist.
