
Tyrannosaurus Rex Did Not Reach Full Size Until Age 40, Study Finds
We all know Tyrannosaurus rex was a giant—possibly the heaviest land predator ever. But how fast did it reach that monstrous size? Turns out, the answer is slower than you might think. A new study examining the leg bones of 17 T. rex fossils suggests these predators took around 40 years to max out at










