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 ].
Spinosaurus weighed 20 tonnes and measured almost 50ft (15m), The swimming dinosaur was 9ft (2.7m) longer than the largest T. rex specimen known. It had jaws filled with vicious slanted teeth and a snout like that of a massive crocodile. Its short muscular hind legs were equipped for paddling and resembled those seen in early limbed whales.