Soft tissue found in T-Rex fossil

From CNN

For more than a century, the study of dinosaurs has been limited to fossilized bones. Now, researchers have recovered 70-million-year-old soft tissue, including what may be blood vessels and cells, from a Tyrannosaurus rex.

John R. Horner of the Museum of the Rockies at Montana State University, said the discovery is "a fantastic specimen," but probably is not unique. Other researchers might find similarly preserved soft tissues if they split open the bones in their collections, said Horner, a co-author of the paper.

The bone matrix was stretchy and flexible and there were long structures like blood vessels. She added that what appeared to be individual cells were visible, but could not say if they were blood cells.