World's most complete stegosaurus

The world's most complete stegosaurus fossil was unveiled at the Natural History Museum in London, England, Dec. 3, 2014. The skeleton is 18 feet long and 9.5 feet tall, has over 300 bones and is the first complete dinosaur specimen to go on display at the Natural History Museum in nearly 100 years.

Stegosaurus on display

The world's most complete stegosaurus fossil was unveiled at the Natural History Museum in London, England.

The stegosaurus lived more than 150 million years ago in what is now Wyoming.

Stegosaurus on display

The museum has named the dinosaur "Sophie," though they do not know the sex of the creature.

Sophie is the name of the daughter of a project contributor.

Stegosaurus on display

The fossils were found in Wyoming's Red River Ranch in 2003.

Stegosaurus on display

Photographers gather around the world's most complete stegosaurus fossil during a press preview at the Natural History Museum in London, England, Dec. 3, 2014.

Stegosaurus on display

It is the world's most complete stegosaurus fossil, but is only 85 percent complete.