Collagen, hemoglobin, elastin, laminin and cell-like structures resembling blood and bone cells have been found in a dinosaur bone scientists still claim is 80 million years old, according to a report in Science magazine today.
Paleontologist Mary Schweitzer of North Carolina State University first claimed to have isolated soft tissues and collagen from a Tyrannosaurus rex leg bone several years ago.
But because the leg was broken during excavation, the evidence was damaged and could never be independently confirmed.
Schweitzer then examined a more pristine leg of a plant-eating hadrosaur excavated from sandstone and found even better samples of soft tissue, according to the report.
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