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The Tyrannosaurus rex or T-rex was one of the largest theropod dinosaurs as it came 240 million years ago -
The titanosaur Patagotitan mayorum is the biggest known dinosaur ever and it's older than the T-Rex -
They were created 90 million years ago were they were thriving with the ecosystem -
Velociraptor is a genus of small dromaeosaurid dinosaurs that lived in Asia during the Late Cretaceous epoch -
The best place to find Dinosaur fossils is high in the deserts and badlands of North America, China and Argentina. -
In the year 68 bce they went extinct due to the asteroids