Tarbosaurus was the king in the Late Cretaceous of Mongolia just as its close relative Tyrannosaurus was king in North America. Although slightly smaller than T.rex, Tarbosaurus was a big bad predator. Smart dinosaurs would avoid this two-legged killing machine.
Discovery: It was named in 1955
Weight: 7000kg or a little less.
Where it lived: Found in Mongolia and China.
When it lived: it lived 75-70 million years ago in the Late Cretaceous.
What it ate: A meat eater, like T.rex, it would eat anything it could fit in its mouth. (they may have even been cannibals.)
Weapon of choice: a massive head with rows of teeth up to 20cm long.
Weakness: T.rex had tiny hands with just two claws; Tarbosaurus had even smaller hands that were even more useless.