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

The mass extinction that wiped out the dinosaurs was triggered by a massive asteroid that slammed into Earth 66 million years ago. But what triggered the asteroid? Harvard physicist Lisa Randall ...

Dinosaurs that failed to adapt went extinct. But then 66 million years ago, over a relatively short time, dinosaurs disappeared completely (except for birds). Many other animals also died out, ...

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 ...

Scientists still debate the purpose of this dinosaur's iconic horns and spiky head plate. Find out what we’ve learned about how Triceratops lived and why it went extinct. Triceratops’ enormous ...

The age of dinosaurs began over 230 million years ago, ushering in an era of unparalleled diversity and dominance. While the non-avian dinosaurs disappeared after the catastrophic asteroid impact ...

On a spring day 66 million years ago, paddlefish and sturgeon swam in a river that meandered through a flourishing landscape populated by mighty dinosaurs and small mammals at North Dakota’s ...

coinciding with the mass extinction event that wiped out the dinosaurs. Gigarcanum delcourti is an extinct species of giant gecko that inhabited either New Caledonia or New Zealand possibly up to ...

According to scientists who maintain that dinosaur extinction came quickly, the impact must have spelled the cataclysmic end. For months, scientists conclude, dense clouds of dust blocked the sun ...