http://www.news.com.au/technology/s...und-in-argentina/story-fn5fsgyc-1226921467666 I just saw this on the cbs evening news. They were as tall as a 7 story building and weigh as much as 14 adult elephants. Here's its Femur next to a full sized man. The creature is believed to be a new species of Titanosaur, a long-necked, long-tailed sauropod that walked on four legs and lived some 95 million years ago in the Cretaceous Period. The dinosaur “weighed the equivalent of more than 14 African elephants,” or about 100 tonnes, said Jose Luis Carballido, a paleontologist at the Egidio Feruglio Museum in the southern Argentine city of Trelew.