often fall into the 100 to 1,000 kilogram (220 to 2,200 lb) category, whereas  recent  predatory  carnivorans peak in the 10 to 100 kilogram (22 to 220 lb) category. The  mode  of dinosaur body masses is between one and ten metric tonnes. This contrasts sharply with the size of  Cenozoic  mammals, estimated by the  National Museum of