There’s a big gap in our fossil record, so the secret to dinosaurs’ success is unclear. “The Middle Jurassic is one of the worst sampled time periods for dinosaurs,” says Susie. One problem is high ...

At the start of the period, dinosaurs ruled the loosening remnants of the supercontinent Pangaea as rodents scurried at their feet through forests of ferns, cycads, and conifers. At the end of the ...

Learn about the time period that took place 251 to 199 million ... including rodent-size mammals and the first dinosaurs. By the start of the Triassic, all the Earth's landmasses had coalesced ...

rex, though these dinosaurs only lived at the end of the period, around 68-66 million years ago. 'The Cretaceous is 80 million years long, so there's a lot of turnover in that time,' says Susie. In ...

The Triassic period stands out in Earth’s history as the time when dinosaurs first evolved. It was followed by the Jurassic and Cretaceous periods – at the end of the latter, the dinosaurs ...