An odd-looking dinosaur whose fossilised remains were found by a Patagonian shepherd looking for lost sheep has prompted a rethink about the lumbering four-legged herbivores called Sauropods. Beloved of toy-makers and cartoonists, Sauropods typically had long flexible necks, studded with as many as 19 vertebrae, that enabled them to munch on lofty vegetation - a classic result of evolutionary pressure. But the new find suggests Sauropods also cleverly evolved in a different way, to exploit vegetation closer to the ground.