Dinosaurs liked it rough — and the fossils they left behind prove it. Top paleontologists have discovered that mating between some species of prehistoric behemoths was so violent that they literally broke each other’s bones, a new study in the journal iScience found. The duck-billed dinosaur — known as Olorotitan to scientists — stretched to an astounding 26 feet in length and weighed a whopping three tons. When paleontologists studied the skeletal remains, they repeatedly discovered a shocking