The Massive Ulughbegasaurus

Ulughbegasaurus, a massive dinosaur that dominated prehistoric ecosystems before T. rex. Ulughbegasaurus was an extraordinary predator, measuring 24 to 26 feet long and weighing over 2,200 pounds. In contrast, the early ancestors of T. rex at the time were far smaller, weighing less than 440 pounds and measuring about 10 feet in length. it likely possessed a running speed within a similar range as other large theropods