Add Yahoo as a preferred source to see more of our stories on Google. It may look like a certain type of duck-billed dinosaur — and quack like one, too. But dinosaur bones identified in northwestern ...

http://www.sciencedirect.com/science/article/pii/S0195667117304329,https://www.sciencedirect.com/science/article/pii/S0195667117304329?_rdoc=1&_fmt=high&_origin ...

Until now, estimating how old a dinosaur was when it died has been a fairly simple process — just count up the growth rings in its fossilized bones. "We always thought that those rings were formed ...