Studying Spinosaurus has always been a challenge, especially after the original fossils were destroyed in a 1944 bombing raid on Nazi-controlled Munich.
Endowed with an advanced auditory system, Parasaurolophus used its ability to communicate with complex low-frequency calls as a primary means of defense.
On the Science Channel's "Mammals vs. Dinos," evidence suggests that the Tyrannosaurus Rex lived as a family unit, caring for its young and living cooperatively.