About 250 million years ago, at the end of the Permian period, something killed some 90 percent of the planet's species. Less than 5 percent of the animal species in the seas survived. On land ...

These familiar marine arthropods first arose about 545 million years ago in the early Cambrian and thrived ... the mega-extinction that ended the Permian period 251 million years ago.

The preservation of footprints, plant fossils, and environmental imprints allows scientists to reconstruct a vivid picture of the Permian period and how early life thrived under changing conditions.

Dinosaurs evolved from more primitive reptiles in the aftermath of Earth's biggest mass-extinction event caused by extreme ...

The Permian period’s mass extinction had wiped out ... marine reptiles such as the plesiosaurs were kings. Plesiosaurus, an early plesiosaur, was about 4.5 metres long with a broad, flat body ...

Kyndall Torres had 11 points, Erinn Mayberry scored 10 and Jaelyn Norman provided nine in Legacy's 45-34 win over Odessa ...