CommentThere are things we will never know about dinosaurs – here's why Despite two centuries of incredible discoveries, an inability to locate fossils means that many secrets about these species will never be found, says David HoneComment
Dinosaur ancestor of long-necked Diplodocus ran swiftly on two legs The gigantic and slow sauropod dinosaurs like Diplodocus had small two-legged ancestors – and one, Thecodontosaurus, was quick and nimble 51¶¯Âþ