Palaeontologists in North Dakota have found a first-of-a-kind duck-billed dinosaur fossil, the BBC reports, containing not just hadrosaur bones, but the remains of skin, ligaments and muscle as well:
The preservation allowed scientists to estimate that it was more muscular than thought, perhaps giving it the ability to outrun predators like T. rex.
The researchers propose that the dinosaur’s rump was 25% larger than had previously been thought. This probably meant more muscle mass and therefore greater acceleration, giving it a greater chance of evading meat-eating dinosaurs in hot pursuit.
Not only did the duck-bill have back, but it was also striped, they say. More words and photos on Wired and Science Daily.