WASHINGTON -- A steep decline in birds, butterflies and native plants in Britain supports the theory that humans are pushing the natural world into the Earth's sixth big extinction event and the ...

(CNN) — A cataclysm engulfed the planet some 252 million years ago, wiping out more than 90% of all life. Known as the Great Dying, the mass extinction that ended the Permian geological period was the ...

couple of Brachiosaurus altithorax and a flock of Pterosaurs in a scenic Late Jurassic landscape© dottedhippo/iStock via Getty Images The Jurassic Period is one of the three prehistoric geological ...

Everyone knows that dinosaurs are extinct, and most people have some idea about how it might have occurred. But the exact periods in history when it happened are less well known. Was it a single ...

We all know the most popular theory about dinosaur extinction, which is a massive asteroid hitting Earth and wiping out nearly everything. However, over the years, scientists, writers, and even ...

It is estimated that throughout the Earth's 4.5 billion-year existence, over 99% of the species inhabiting it have gone extinct. Many of these species died due to mass extinction events. Life on Earth ...