Although they existed for only 15 million of the 150 million years that dinosaurs roamed the Earth, they are easily the most famous of all. Scientists have been debating for more than 20 years whether T-rex was a predator that ran down its prey, or a scavenger that fed only on the carcasses of dinosaurs killed by faster hunters. 65 million years ago the reign of the "tyrant king" ended with the mysterious demise of all his kind. Although they existed for only 15 million of the 150 million years that dinosaurs roamed the Earth, they are easily the most famous of all. Scientists have been debating for more than 20 years whether T-rex was a predator that ran down its prey, or a scavenger that fed only on the carcasses of dinosaurs killed by faster hunters. 65 million years ago the reign of the "tyrant king" ended with the mysterious demise of all his kind.
