"Discovery of Jormungandr Walhallaensis: A New Mosasaur Unearthed in North Dakota"
Scientists have discovered a new species and genus of mosasaur, a giant sea creature that lived alongside dinosaurs, in North Dakota. Named Jormungandr walhallaensis after the Norse sea serpent and the town of Walhalla, the mosasaur lived about 80 million years ago and is a unique mix of traits from other mosasaur species. While there is debate over whether it is a new genus or species, the discovery provides valuable data for understanding the evolution of mosasaurs. The mosasaur likely measured 18 to 24 feet long and preyed on fish and small creatures in the Western Interior Seaway.