Why was Rex making a nest?
What does a T. rex look like in real life? In general, these specimens exhibited small, wrinkly scales, more like the skin seen on the feet of tortoises and birds than the overlapping scales of snakes and lizards. The discovery of small meat-eating dinosaurs from China preserved with primitive, simple, feathers changed this paradigm.
How long did T. rex live? Tyrannosaurus rex had a life expectancy of about 28 years. Previous studies have suggested that it went through a growth spurt in its teenage years, but until recently, scientists didn’t know much about how it grew from a hatchling to a powerful predator.
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.