Mosasaurs were born at sea, not in safe harbors

From Norman, Okla., at a meeting of the Society of Vertebrate Paleontology

Mosasaurs were prehistoric aquatic reptiles that cruised the world’s oceans for 30 million years or so before they and the dinosaurs on land went extinct, about 65 million years ago. Newly discovered mosasaur fossils suggest that the creatures gave birth in midocean, countering previous theories that their first days were spent on or near shore.