In the prehistoric days before Jurassic Park and Barney, the focus of dinosaur-mania for anyone growing up in New York City was the American Museum of Natural History, where the looming skeleton of Tyrannosaurus rex inspired awe in generations of children. Now, with the renovation and extension of its dinosaur exhibit, that venerable and much-loved institution offers a history of its paleontology department, from its creation in 1891 to the present day. Among the adventures Wallace (The Audubon Society Pocket Guide to Dinosaurs, not reviewed) recounts are those of Barnum Brown (known as ``Mr. Bones''), who discovered the museum's T. rex in Hell Creek, Mont., in 1907; Roy Chapman Andrews, whose dinosaur- hunting fields in 1922 were in the Gobi Desert, where he unearthed the giant rhinoceros Paraceratherium; to Malcolm McKenna, who returned to the Gobi in the 1990s and found the remains of the Velociraptor. No amount of cinematic magic can surpass the wonder induced by a personal encounter with the remains of these giants who once stalked the earth.
