Scientists Find Soft Tissue in T-Rex Bone

A 70-million-year-old Tyrannosaurus rex fossil dug out of a hunk of sandstone has yielded soft tissue, including blood vessels and perhaps even whole cells, U.S. researchers reported on Thursday.

Paleontologists forced to break the creature's massive thighbone to get it on a helicopter found not a solid piece of fossilized bone, but instead something looking a bit less like a rock.

"They are transparent, they are flexible," said Mary Higby Schweitzer of North Carolina State University and Montana State University, who conducted the study.

She said the vessels were flexible and in some cases their contents could be squeezed out.

Of course, the big question is whether it will be possible to see dinosaur DNA. "We don't know yet. We are doing a lot in the lab now that looks promising," Schweitzer said.