Like many another kid in West New York, N. J., Alfred Siefker, 17, wears a longish haircut, low-slung pegged trousers and a cigarette dangling from the corner of his mouth. The style suggests the drugstore cowboy, but under the disguise Alfred practices a different skill. He is already a dedicated scientist who has just rewritten a chapter of paleontology.
Last week at Manhattan's famed American Museum of Natural History. Alfred and two friends—Joseph Geiler, 16. and Michael Bandrowski, 16—exhibited the fossil of a winged reptile, oldest airborne vertebrate known to man. Siefker's protorosaur, said Dr. Edwin H. Colbert, head of the museum's...