And,they believed T.rex could eat up to two hundred thirty kilograms of meat in one bite.

VOA: special.2009.09.01

But now it seems that T.rex may not have been as fierce as scientists once believed.

VOA: special.2009.09.01

For example, the small arms on T.Rex did not develop as the creature got bigger.

VOA: special.2009.10.13

Professor Sereno says Raptorex Kriegsteini was probably just as effective at killing as T.Rex.

VOA: special.2009.10.13

Many children's books show T.rex fighting bloody battles with other huge dinosaurs.

VOA: special.2009.09.01

But the creature you are imagining is only one-hundredth of T.Rex's size.

VOA: special.2009.10.13

There are some signs of conflict between T-rex and other large dinosaurs.

VOA: special.2009.09.01

T.rex was one of the largest meat-eating dinosaurs that ever lived.

VOA: special.2009.09.01

T.Rex had a big head, long legs and small arms.

VOA: special.2009.10.13

T.Rex lived between sixty-five and eighty-five million years ago.

VOA: special.2009.10.13

This describes Raptorex Kriegsteini a distant relative of T.Rex.

VOA: special.2009.10.13

Now,try to imagine a dinosaur that looked like T.Rex.

VOA: special.2009.10.13

Raptorex was not a T.Rex.

VOA: special.2009.10.13