Ulughbegasaurus, a giant predator from 90 million years ago that eclipsed the first tyrannosaurs, has been discovered.

rex. This giant, now known as Ulughbegasaurus, ruled the prehistoric world around 90 million years ago, long before the rise of its more famous cousin. The fossil record has now offered up this ...

“The extinction of Ulughbegasaurus may have been driven by changes in prey or environmental conditions,” Zelenitsky said. Its disappearance marked a turning point in dinosaur evolution. With these ...