Why was Rex making a nest?
How does the real T. rex look like? Tyrannosaurus rex, whose name means “king of the tyrant lizards,” was built to rule. This dinosaur’s muscular body stretched as long as 40 feet—about the size of a school bus—from its snout to the tip of its powerful tail. Weighing up to eight tons, T. rex stomped headfirst across its territory on two strong legs.
How long did T. rex live? rex, including how long it lived (roughly 28 years), when it reached sexual maturity (roughly 15.5 years old), and how much it weighed when fully grown (roughly 15,000 pounds, on average). These data let scientists calculate T. rex’s approximate generation time—19 years, give or take—and the average body mass of T.
Why did T. rex have small arms? The scientists believe small limbs gave the carnivores survival advantages. “I’m convinced that those proportionally tiny arms had some sort of function. The skeleton shows large muscle insertions and fully developed pectoral girdles, so the arm had strong muscles,” said Juan Canale, lead author of the study.