This graph plots extinction ... Cretaceous/Tertiary (K/T) boundary. The fossil record, however, describes sudden, global extinctions that affect many species. These dramatic events are known as ...

You might know the Cretaceous Period for big animals such as Tyrannosaurus rex and Triceratops, or for being the end of the age of dinosaurs. But what was the world like in the millions of years ...

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 ...

Scientists have discovered levels of iridium 30 times greater than average in the Cretaceous/Tertiary (KT) boundary, the layer of sedimentary rock laid down at the time of the dinosaur extinction.

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

The most famous mass extinction happened at the end of the Cretaceous some 65 million years ago, when 76% of all species went extinct, including the large dinosaurs and ammonites. Minor extinction ...

This wasn't the first mass extinction in our planet's history, but it was one of the most transformative, reshaping ecosystems and paving the way for new life forms. The so-called Cretaceous ...