Patagotitan mayorum

In 2012, a rancher in Patagonia, Argentina reported finding fossils on his land. This is a common find in Argentina. But after 18 months of excavation, it led to a very uncommon discovery: a new species of titanosaur. And it is one of the largest dinosaurs ever found! This massive plant-eater lived about 100 million years ago. Today, a cast of this 122-foot-long titanosaur welcomes visitors to the fossil halls at the American Museum of Natural History.

Name: Patagotitan mayorum

Lived: 95 to 100 million years ago (Cretaceous Period)

Fossil Found: what is now Argentina, South America

Discovered: 2014

Length: 122 feet (37 m)

Weight: 70 tons (= 10 African elephants)

Diet: Plants

Cool Fact: With its neck stretched out, this dinosaur could have peered into the top floor of a five-story building!

Image credits: main image, © AMNH/D.Finin.