Paleontologists at the University of Toronto just found collagen in a 195 million year old fossil. This makes it the oldest protein that has ever been found. Previously, the oldest protein sample was only 80 million years old (it was also collagen, from a dinosaur bone). They also found hematite crystals in the fossil, which possibly came from the blood. The dinosaur was a Lufengosaurus that lived in Yunnan Province, China.
Some other paleontologists didn’t like the new, non-invasive methods that the team used used to identify the collagen, but other scientists thought the methods were fine. Read the whole article here https://cen.acs.org/articles/95/i6/Collagen-found-195-million-year.html and let me know what you think.