100M year old dinosaur tracks reported in the journal Chinese Science Bulletin suggest that some dinosaurs were strong swimmers. Carnivorous two-legged dinosaur swimming in a river, making claw marks as it touches bottom with its tiptoes (Nathan E. Rogers) “Humans have been around for about 200,000 years. Dinosaurs ruled for Earth for 160 million years,” said study co-author Scott Persons, a paleontologist with the University of Alberta. “From...
