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 ].
The male and female were about the  same size. A baby T. Rex weighed 66 pounds! T. Rex lived about 65  million years ago in the Cretaceous Peâ¦riod. Luckily T. Rex is long  gone because if he were here now, lots of people would have became  a midnight snack.