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T. Rex Blood?

Preserved soft tissue, including possible blood vessels and red blood cells, are turning up in dinosaur fossils.
Topic: NatureNatureBrand: NOVA ScienceNOWNOVA ScienceNOW

(This video is no longer available for streaming.) Paleobiologist Mary Schweitzer has defied the long-held belief that it is fruitless to search for preserved soft tissues in dinosaur remains. Most experts thought that such structures would have decayed and vanished long ago, but Schweitzer has found evidence of delicate structures such as blood vessels and red blood cells that have survived for millions of years.

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