From cinema fodder to in-depth scientific inquiry, the potential destruction caused by an asteroid striking earth is all too well known by movie fans and researchers alike. Arguably, one of the most infamous past events is ascribed to the dinosaur extinction at the Cretaceous-Paleogene (K-Pg) boundary: the Chicxulub impactor, hypothesized to have been an asteroid that struck merely a few miles from the current-day city, Chicxulub, Mexico. Hundreds of paleontological sites worldwide have preserved tell-tale signs of this boundary—including fossils—but none present the richness exhibited at a location in North Dakota named “Tanis”. Described in a recent Proceedings of the National Academies of Science article, the Tanis site is located in the Hell Creek Bed Formation of North Dakota, and was likely to be an estuary in an ancient river valley. The presence of fossils of land animals, aquatic reptiles, and other marine-faring creatures at the site suggest that water from an inland sea was imparted to this area through a tsunami-like rush following the asteroid impact and onset of 10-11-magnitude earthquakes. The presence of masses of entombed fossilized fish with their gills permeated with tektites—tiny glass globules that arose from molten earth created upon asteroid impact—provide evidence that seismically-driven seiche waves had pushed these animals onto dry land following a harrowing rain of glass particles and other debris. With both convincing biotic and geologic evidence, it appears this major deposition event at Tanis is likely to have corresponded with the arrival of seismic waves produced by the Chicxulub impactor thousands of miles away. Further studies of this site are ongoing, and the unparalleled preservation of the sediment and fossil record leaves little doubt that there will be years of buried treasure to uncover, so we may better understand the events that occurred at the Cretaceous-Paleogene boundary.