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Dinosaur Fossils Preserve Apparent Red Blood Cells, Collagen

They looked, as one researcher said, like "rubbish," eight seemingly inconsequential Cretaceous Period dinosaur fossils that sat in a London museum's collection for more than a century after being found in Canada's Alberta province. But a fresh examination revealed the 75-million-year-old fossils to be quite remarkable, boasting microscopic structures that appear to be red blood cells containing nuclei as well as rope-like collagen fibers, scientists said on...

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