Scientists believe it is a new species of Titanosaur – an enormous herbivore dating from the Late Cretaceous period. The fossil was excavated 135 miles West of Trelew, Patagonia, by a team of palaeontologists from the Museum of Palaeontology Egidio Feruglio.
Based on its huge thigh bones the dinosaur discovered in Argentina was 130 ft long and 65 ft tall.
A film crew from the BBC Natural History Unit was there to capture the moment the scientists realized exactly how big their discovery was. For more information, visit BBC.com and Museum of Palaeontology Egidio Feruglio.