Roughly 201 million years ago, drastic changes extinguished many forms of life and led to conditions that allowed the ...

Several factors contributed to the survival of crocodiles, turtles, lizards and birds 66 million years ago, say our readers ...

Previous studies have posited that the mass extinction that wiped the dinosaurs off the face of the Earth was caused by the release of large volumes of sulfur from rocks within the Chicxulub impact ...

The ammonites came to an end 66 million years ago, during the planet’s most recent mass extinction event. In the final days of the Cretaceous, a 7.5-mile-wide asteroid slammed into Earth and ...

With a massive body, sharp teeth, and jaws so powerful they could crush a car, this famous carnivore dominated the forested river valleys in western North America during the late Cretaceous period ...

In the Permian period before, the largest mass extinction event in Earth’s ... during the periods after the Triassic – Jurassic and Cretaceous – and ruled Earth’s landscape for 165 million ...