Earth's history is marked by violent mass extinctions that have shaped life on the planet. Here's how many of these events ...

Many of the losers in these past mass extinctions were incredibly successful groups,” said Ceballos, a senior researcher at the Institute of Ecology at the National Autonomous University of Mexico.

The Jurassic Period is one of the three prehistoric geological periods of the Mesozoic Era. It spans from 145 million to 201 million years ago. This period was preceded by the Triassic Period and ...

Introduction -- Beginnings -- The end-Ordovician mass extinction -- The late Devonian mass extinction -- The end-Permian mass extinction -- The end-Triassic mass extinction -- The end-Cretaceous mass ...

The narrative of life on Earth is marked by a continual ebb and flow, characterized by the emergence and extinction of countless species over time. Extinction, an inherent aspect of the evolutionary ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Stewart Edie, Smithsonian Institution (THE CONVERSATION) About 66 million years ago – ...

Could you run for 100 hours this year? How about just doing a little more than 15 minutes each day? In fact, these goals are essentially equivalent, but one certainly sounds more ambitious than the ...

About 66 million years ago – perhaps on a downright unlucky day in May – an asteroid smashed into our planet. Even groups that weathered the catastrophe, such as mammals, fishes and flowering plants, ...