Sauropod swimmers or walkers?

An international team of scientists, led by the China University of Geosciences in Beijing and including palaeontologists from the University of Bristol, has shed new light on some unusual dinosaur tracks from northern China. The tracks appear to have been made by four-legged sauropod dinosaurs yet only two of their feet have left prints behind.

South American dinosaurs Amargasaurus Carnotaurus Giganotosaurus SALTASAURUS

Could dinosaurs swim?

Saurpod Dinosaur Footprints Discovered on the Isle of Skye

Dinosaur thought to be a carnivore is actually a timid VEGETARIAN that lived 220 million years ago

Dinosaur record hi-res stock photography and images - Alamy

BBC - Wonder Monkey: Evolution, sex and dinosaur necks

Aquatic Hadrosaurs - TV Tropes

Sauropod (Pilot), Walking with Wiki

Dinosaur tracks seem to show giant sauropods wading on two front legs

Were dinosaurs all at sea?, Science