The World's Largest Dinosaurs exhibit (11 images)

The fossils of an Allosaurus looms near a photographer during the press conference for "The World's Largest Dinosaurs" exhibit at the American Museum of Natural History on April 13, 2011 in New York City. UPI /Monika Graff

The neck of the life-sized model of a 60-foot-long Mamenchisaurus looms overhead at "The World's Largest Dinosaurs" exhibit at the American Museum of Natural History on April 13, 2011 in New York City. UPI /Monika Graff

People view the skeleton of a dinosaur at "The World's Largest Dinosaurs" exhibit at the American Museum of Natural History on April 13, 2011 in New York City. UPI /Monika Graff

The neck and head of the life-sized model of a 60-foot-long Mamenchisaurus looms overhead at "The World's Largest Dinosaurs" exhibit at the American Museum of Natural History on April 13, 2011 in New York City. UPI /Monika Graff