(1884–1960), U.S. explorer and naturalist, born in Beloit, Wis.; director American Museum of Natural History, New York, N.Y., 1935–41; explored Alaska, East Indies, Korea, China, Mongolia, central Asia; discovered huge fossil fields in the Gobi region; found first dinosaur eggs ever discovered, about 10,000,000 years old, and skeleton of largest land mammal (natural history: ‘This Amazing Planet', ‘Nature's Ways'; autobiography: ‘An Explorer Comes Home'; for younger readers: ‘Quest in the Desert', ‘All About Dinosaurs', ‘All About Whales', ‘Quest of the Snow Leopard', ‘In the Days of the Dinosaurs')