If you haven’t visited the Art of Science Gallery in a while, you’re in for a surprise. There’s a special exhibit called Drawn to Dinosaurs: Hadrosaurus foulkii, featuring that famous duck-billed dinosaur from Haddonfield, N.J.

The exhibit features an impressive 25-foot-long cast of Hadrosaurus foulkii, plus a life-size color drawing of it on a chalkboard. The drawing was created in early February during a public happening. The Academy’s Jason Poole  visualized the living dinosaur based of its fragmentary fossils—just as the exhibit explains—and then drew and colored the plant-eater on a Saturday over a period of six hours.

The video of this feat, below, is mercifully only 3 minutes long, a time-lapse trick.

Find out why Hadrosaurus foulkii is called “the dinosaur that changed the world” by visiting Drawn to Dinosaurs. It will be on display through June 9.