Find out what fossils have revealed about ichthyosaurs, which included the biggest marine reptile that ever lived.

The colossal 180 million-year-old fossilized remains of an ichthyosaur have been found in the UK, in what researchers have described as one of the most significant discoveries in the region.

A newly identified ichthyosaur from the UK’s Jurassic Coast is rewriting part of the prehistoric playbook. Nicknamed the “Sword Dragon of Dorset,” the three-meter-long marine reptile lived during a ...