Argentine paleontologists have unveiled the replica of a 65-million-year-old skeleton of a plesiosaur.
The fossil is of a marine reptile found in Cretaceous period rocks close to the southern town of El Calafate, 2,800 kilometers (1,700 miles) from Buenos Aires.
The remains of this plesiosaur are the most complete found in Argentina and were discovered in rocks submerged in Lake Argentino at the foot of the Andes mountains.
Plesiosaurs were huge marine reptiles that lived in seas throughout the entire planet inhabited the entire planet, with long necks, tiny heads and sharp teeth.
It was an era before the Andes existed and when Argentine Patagonia lay underwater.
The fossil in the Natural Science Museum in Buenos Aires is 9 metres long, with 1.3-metre fins.