Spinosaurus is king of dinosaurs

This T Rex is 4m smaller than the Spinosaurus

New evidence shows the Tyrannosaurus Rex and the bigger Gigantosaurus weren't the kings of the dinosaurs.

Instead experts have worked out that the Spinosaurus was the biggest, measuring 17 metres (55ft) from nose to tail, with long, crocodile-like jaws.

The giant dinosaur was first discovered in 1912, but most of the fossils were destroyed by a World War Two bomb.

A new examination of two skull bones proves that the Spinosaurus was more than 4m bigger than the T Rex!

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Spinosaurus was a theropod which stood on two legs, like the T Rex. It's estimated one would weigh between seven and nine tonnes.

Dinosaur data Dinosaurs lived about 230 million years ago There were more than 700 different types of dinosaur The word dinosaur means "terrible lizard" in Greek

Their long teeth locked together to catch prey, and there is evidence that they fed largely on fish.

The biggest T Rex fossil is one called Sue, which measured 12.8m (42ft) long and is thought to have weighed 6.4 tonnes when it roamed the earth 67 million years ago.

About 10 years ago, scientists discovered Gigantosaurus, a meat-eater living 100 million years ago in what is now Argentina, which stretched to 13.7m (45ft).

But this new discovery means Spinosaurus is the biggest of all known predatory dinosaurs.