About 250 million years ago, at the end of the Permian period ... between a dog and a lizard—the synapsids were Earth's first great dynasty of land vertebrates. "We've found fossils of many ...

Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing over a period of roughly 30 million years, but that would come to a halt ...

Two hundred and fifty one million years ago, the worst mass extinction event Planet Earth has ever seen ruined the life of ...

Read More: The Permian Extinction: Life on Earth Nearly Disappeared During the ‘Great Dying' Applying evidence from experiments on extant marine animals, the team populated their model with the ...

The end-Permian mass extinction, also known as the "Great Dying," took place 251.9 million years ago. At that time, the supercontinent Pangea was in the process of breaking up, but all land on ...

Scientists don’t call it the “Great Dying” for nothing. About 252 million years ago, upward of 80% of all marine species vanished during the end-Permian mass extinction – the most extreme event of its ...

The Permian-Triassic extinction event, also known as the Great Dying, took place roughly 252 million years ago and was one of the most significant events in the history of our planet. It represents ...

Scientists don’t call it the “Great Dying” for nothing. About 252 million years ago, upward of 80% of all marine species vanished during the end-Permian mass extinction – the most extreme ...

(Image Credit: Tami Freed/Shutterstock) While trilobites, like the ones pictured here, survived for millions of years, they did not survive the "Great Dying." However, clams took over the oceans in ...

Scientists don't call it the "Great Dying" for nothing. About 252 million years ago, upward of 80% of all marine species vanished during the end-Permian mass extinction—the most extreme event of ...