List the 4 basic principles of genetics that mendel discovered in his experiments. briefly describe each princeiples.
Results showed T. rex was heavier than previous estimates, which ranged from about 4.5 tons to 6.5 tons, with the Field Museum's Sue skeleton weighing a heaping 9 tons (about 8,164 kilograms). [ Gallery: The World's Biggest Beasts ].
Where Did T Rex Live. A T-Rex usually lived for around 25-29 years. That was the average life span of a single individual. You have to remember though, it was 65 million years ago, and there were a lot of other dinosaurs around.