“Why did they think T. Rex stood with his tail on the ground?”
The Museum of Science in Boston boasts two life-size statues of the T. Rex. The one in the permanent dinosaur exhibit stands in the now-classic T. Rex pose: the predator in mid-stride, while the other stands primly with his tail on the ground. How do scientists know which stance is right? And why do they change their minds about dinosaurs all the time?