May 8 (UPI) --Some early ichthyosaurs used rounded, pebble-like teeth to crush the shells of snails and clam-like bivalves, according to new research. Roughly 252 million years ago, the end-Permian ...

As bad as things might seem here in 2020, they could be worse: we could be living 252 million years ago during the Permian mass extinction. Volcanic eruptions and dramatic, sudden climate change ...

Ichthyosaurs were marine reptiles during the time of the dinosaurs, and scientists don't know much about their ancestry. But by CT-scanning the fossil of one of the first ichthyosaurs, scientists ...