Tyrannosaurus Rex/Dino Riders

Tyrannosaurus Rex is the best known dinosaur there is. He starred in several movies and entertainment parks.

Tyrannosaurus Rex was one of the last carnivore before the dinosaurs' extinction. He was also one of the biggest carnivores ever.

Tyrannosaurus Rex must also be one of the most discussed dinosaurs in the scientific community. It was long thought that he was a tail dragging slow creature. Newer research then alternated between describing him as fast ruthless predator and slow sneaky carrion eater.

He had a bite force that exceeded 5 tons and most likely was a fast predator. Its whole body was built for killing. A disproportionate huge head - that is best described as maw with eyes - was supported by long muscular legs. Body features not directly needed for hunting had been bred out.

The vestigial two-fingered arms are one of the consequences of this optimization. The arms of tyrannosaurus rex were no longer than a humans arm and only slightly more muscular. It is unclear how he used the arms, but the most plausible theory suggests that it used the arms as "forks" to hold its food during consumption.