The researchers did not find evidence of intact genetic material, however, and the chance of recovering DNA from such old specimens is unlikely. “There is no genetic material, no evidence at all,” Susannah Maidment of Imperial College and a coauthor of the work, told The Independent. “But it would be unwise to say ‘never’ in science. Who knows what we might find if we look hard enough.”
The team scanned eight dinosaur bones from the Cretaceous period—from 145 million to 66 million years ago—that were unearthed in Canada and housed at the Natural History Museum in London for more than a century. The team used nano-analytical techniques, such as time-of-flight secondary ion mass spectrometry (ToF-SIMS), to identify amino acid fragments characteristic of collagen fibrils, plus other techniques to image what appeared to be blood cells in the claw of a therapod dinosaur.
Even though the fossils did not yield intact DNA, finding decently preserved soft tissues may open the door to myriad insights into dinosaur biology. “In ten to fifteen years we might know a lot more about dinosaurs than we ever thought possible: information about physiology and what they looked like that we could never get from the bones alone,” Maidment told Discover’s D-brief. “Our discovery has simply shown the potential for what might be preserved if we look in the right place.”