The world’s largest dinosaurs - in New York

Mamenchisaurus is the biggest star at The World’s Largest Dinosaurs exhibition that opened at the American Museum of Natural History in New York on April 16.

It is one of the world’s largest dinosaurs that lived 140 million years ago. It was 60 feet long and had a 35-foot-long neck.

These giants became sexually mature at the age of 23. Their newborns were almost as small as human babies but doubled in size within five days and then doubled again within the next seven days. Scientists think these dinosaurs that had the world’s longest necks ever, grew in size till 35 years.

This is how an 18-year-old female Mamenchisaurus, whose fossilized bones were discovered in China, looked.

The exhibition compares humans and dinosaurs.

Scientists have created the first interactive model of a Mamenchisaurus in the next room to its skeleton, which is so big it almost did not fit in the museum. The “animated” version shows realistic skin, muscles and internal organs.

Most dinosaurs were herbivorous.

Front, a reconstructed skeleton of a Triceratops.

This is how an ancient bear looked.

A member of the mastodon family.

A mastodon.

The largest dinosaur, the Argentinosaurus, weighed 90 tons or as much as 15 adult male African elephants.