Tyrannosaurus rex as much bigger
Tyranosaurus rex has a living weight of 8, 800 kilo grams. They are 66 million years old. It was first discovered in Canada in 1991. A team of Paleontologists at University of Alberta came to this conclusion after measuring its skull, hip and limbs. The skeleton was put together in Canada after a hard work of 10 years. Scientists say that only 90% of her skeleton found, still she is the biggest.