London, Aug 7 - Two titans fighting a bloody battle is the staple of movies like Jurassic Park. A new study of the fossils, however, indicates that theropods, the large predatory dinosaurs, were hunting much smaller prey.

Oliver Rauhut, paleontologist at Ludwig-Maximilians-Universitat (LMU) in Munich, and his colleague David Hone surmise that giant carnivores like T-Rex preyed mainly on juvenile dinosaurs.

'Unlike their adult and well-armed relatives, these young animals hardly posed any risk to the predators,' said Rauhut. 'And their tender bones would have added important minerals to a theropod's diet. Now we hope for more fossils to be found that add new evidence to our hypothesis.'

King of tyrants, T-Rex is by far the most famous dinosaur. Not even recent findings of slightly bigger - and maybe even more terrifying - species like Giganotosaurus could dent the aura of 'T-Rex.'

But what would happen if the king turned out to be a baby killer instead of a fearless hunter of much bigger prey?

'Animals such as Tyrannosaurus are often seen as the perfect 'killing machines' with extremely powerful bites, which were able to bring down even the largest possible prey,' said Rauhut.