2. I feel the reason giant dinosaurs faced extinction was because of their lack of intelligence and how they didnt have much of a developed world as we do which led to lack of protection. I do think dinosaurs could survive in todays world but only in places like zoos and places that are very guarded.
3. Mammoths and Megalodons
4. They can grow up to be 40 feet tall and are about the size of a school bus. They can weigh up to 8 tons and have short arms.
