A Lost Sea Once Split America in Two — Its Traces Are Still Around Us

Beneath the wheat fields of Kansas, the Badlands of South Dakota, and the cliffs of Mesa Verde lies the story of a vanished ocean. 90 million years ago, the Western Interior Seaway split North America in two, creating separate dinosaur worlds, sea monsters, and landscapes we can still walk on today. In this video, Professor Warren Wilder shares 25 remarkable geographic facts about this lost sea and the traces it left behind, from 40-foot mosasaurs and chalk towers to the shale oil boom and the salty Colorado River. Which fact surprised you the most? Let me know in the comments! If you enjoy geography, history, and the hidden stories beneath familiar places, subscribe for more. #Geography #WesternInteriorSeaway #AmericanGeography #Dinosaurs #Mosasaur #Cretaceous #GreatPlains #Kansas #SouthDakota #Badlands #MesaVerde #Paleontology #DeepTime #HiddenAmerica #GeographyFacts #History