Scientists have named an ancient species of giant sea lizard with "angry eyebrows" and a stumpy tail after Jörmungandr, a sea serpent from Norse mythology. The fearsome creature, Jǫrmungandr ...

A team of researchers has identified a new species of mosasaur, an extinct aquatic reptile that dominated the oceans during the late Cretaceous period. This discovery, named Jormungander walhallaensi ...