John Bell Hatcher (1861–1904) was an American paleontologist and renowned fossil-hunter most famous for discovering Torosaurus in Wyoming. Born in Cooperstown, Illinois, Hatcher matriculated at Grinnell College in Iowa in the autumn of 1880, then transferred to Yale University, where he and his paleontological prowess were discovered by the great paleontologist Othniel Marsh, who invited him to a paleontological dig in Nebraska.
Unknown to John Bell Hatcher, a disturbance in time allowed a Torosaurus to appear in 1890 Wyoming. A group of hunters in Hatcher's employ killed the dinsosaur, believing it to be some sort of diseased buffalo. Hatcher never saw the carcass, and so ate the dinosaur without realizing just what it was he was eating.