"Jormungandr: The Angry-Eyebrowed Sea Dragon Unearthed on a Roadside"

Paleontologists have discovered a new species of mosasaur, a giant sea reptile that lived 80 million years ago. Named Jormungandr walhallaensis after a sea serpent in Norse mythology and the city in North Dakota where the fossil was found, this mosasaur had "angry eyebrows" caused by a bony ridge on its skull and measured about 7 meters (24 feet) in length. It is a unique combination of features seen in two other well-known mosasaurs, Clidastes and Mosasaurus. The discovery sheds light on the evolution and diversity of these ancient sea monsters.