PHILADELPHIA -- One hundred and forty years after it became the world's first museum to display a mounted dinosaur skeleton, Philadelphia's Academy of Natural Sciences is celebrating the historic event's anniversary with a new 2008 exhibit. Called "Hadrosaurus foulkii, The Dinosaur That Changed The World," it features a completely new skeleton mount of the famed fossil discovered in 1858 in a marl pit in Haddonfield, New Jersey. The new exhibit features a completely new skeleton mount of the prehistoric creature. The same historic dinosaur fossil is also depicted in a large bronze sculpture in the center of Haddonfield.