In 2014 paleontologists in Patagonia, southern Argentina unearthed a 90-million-year-old fossil of what they claim is one of the largest dinosaurs found to date. The dinosaur, Patagotitan mayorum, weighed about 80 tons, the equivalent of 14 grown elephants.
A complete skeleton was found in a field discovered by a farm worker, where up to seven such complete skeletons are believed to exist, in the locality of El Sombrero.
(Click to Enlarge)
Titanosaurs lived at the end of the Cretaceous (145 mya to 66 mya).