Oldest ichthyosaur fossil suggests they evolved before the Age of Dinosaurs

250-million-year-old fossils hint that the marine reptiles survived Earth’s biggest mass extinction.

Illustration of a pod of shastasaurus [not the same species as the specimen found in Norway] swimming through Triassic seas. Shastasaurus was a marine reptile belonging to the group known as ichthyosaurs. Credit: Mark Garlick / Science Photo Library / Getty Images.