During adolesence Tyranosuares Rex and it's relatives sometimes doubled their weight in just 4 years, according to the new study. Adult T Rex Could weigh more than 5,000 kilograms. The species of T rex lived in North America between 65 and 68 million years. On average, a T rex grows 2 kilograms every day till it's eighteen. Scientists suggest that a T rex would be to big to run for his food, it would have to scavenge. The youngsters, although, could scurry around to catch prey.
By: Calvin and Karl
http://www.sciencenewsforkids.com/articles/20040825/Note2.asp
