Fossil Site Reveals Day That Meteor Hit Earth and, Maybe, Wiped Out Dinosaurs. Paleontology, Dinosaurs, Fossils, Meteors and Meteorites, North Dakota, Endangered and Extinct Species, Asteroids, Geology, Alvarez, Walter (1940- ), DEPALMA, ROBERT A, Manning, Phillip L, Proceedings of the National Academy of Sciences, your-feed-science