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Colossal dinosaur cast goes on display at the American Museum of Natural History
A replica of one of the largest dinosaurs ever discovered is unveiled at the American Museum of Natural History on January 14, 2016 in New York City. The replica of the "Titanosaur" weighs about 70 tons, is 17 feet tall and stretches to nearly 122 feet long. The dinosaur belongs to the titanosaur family and was discovered by Paleontologists in the Patagonian Desert of Argentina in 2014 and lived about 100 to 95 million years ago. The exhibit at the museum features bones, fossils and a fibreglass replica of the creature. Spencer Platt/Getty Images/AFP.

By: Jennie Matthew

NEW YORK (AFP).- A cast and fossils from a brand new species of titanosaur, one of the largest dinosaurs ever discovered, went on display on Thursday in New York for the first time.

It comes from a species so newly discovered that its scientific name has not yet been formally released, say the paleontologists who made the extraordinary find in 2014, in Argentina's Patagonia region.

The remains of the giant herbivore, which would have lived 100 million years ago, were excavated in the desert near La Flecha, 135 miles (216 kilometers) west of Trelew, by the Argentinian team.

The colossal exhibit unveiled at the American Museum of Natural History is 122 feet (37.2 meters) long. It is so enormous that its head and neck extend out of the room into a lobby near the elevators.

The animal was a young adult of unknown sex, that would have weighed 70 tons or as much as 10 African elephants, the museum said.

Paleontologist Diego Pol, who helped lead the excavations, told AFP that the discovery was a "once in a lifetime" moment.

"It's very exciting when you're uncovering sediment that buried an animal 100 million years ago and you're the first person taking this femur out and bringing it for the first time back to the surface," he said.

A rancher initially tipped off the Museum of Paleontology Egidio Feruglio that he spotted something, but it was only when Pol's team began digging that they realized they were onto something big.

"It's a rather unique feeling and it's really exciting. So that was a great moment. The big surprise came a few weeks after very hard work when we realized there were so many other bones there as well."

In total 223 fossil bones from six of the creatures were discovered at the site, all young adults who died at different times from a few years to centuries apart.

The species lived in the forests of modern-day Patagonia 100 to 95 million years ago, during the Late Cretaceous period.

Experts say that young herding animals can become isolated from their group and die of stress and hunger, often near water resources.

Fairly complete skeleton
One femur found at the site is among five original fossils on temporary view with the titanosaur model in New York, before they go back to the museum in Argentina.

Experts say it is one of the largest dinosaurs ever discovered.

The giant cast took a firm in Canada more than six months to make, based on 84 fossil bones that were excavated from the site in 2014.

The real fossils would have been far too heavy to mount, so the life-size model is made up of 3D prints made of fiberglass of the bones.

With its neck elevated, the titanosaur would have been tall enough to peer into the window of a five-story building, the museum said.

"It is the first time we have a fairly complete skeleton of the giant titanosaurus," Pol told AFP. Before, experts had just a few bones.

"So we couldn't understand completely how these animals were moving around, how fast they were growing, all sorts of questions that relate to trying to understand these fantastic animals," Pol said.

His team worked 18 months on seven different expeditions to get all the fossils from the excavation site to their museum in Argentina.

Each bone was protected in plaster during transportation, and getting a plaster jacket for the femur alone took a week with five people working eight hours a day, Pol told reporters.

They even had to build a road in the remote region to allow trucks and machinery to transport all the bones back to the museum, he added.

Mark Norell, chair of paleontology at the American Museum of Natural History, said titanosaurus lived on every continent, and predicted more discoveries, particularly in relatively unexplored parts of Patagonia and Central Asia.

The story of the dramatic discovery and the new animal has been made into a BBC documentary, to be broadcast in Britain on January 24 and in the United States on PBS on February 17.

© 1994-2016 Agence France-Presse

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