250 million years ago, catastrophic volcanic eruptions plunged Earth’s oceans into a toxic, oxygen-starved crisis that erased ...

If you’re an animal living through a mass extinction, it’s best to be one that’s found a unique way to make a living. A new analysis of the species that lived or died out in the wake of the asteroid ...

From a small population in eastern Africa to a species that has altered the atmosphere, oceans, and biosphere, this video ...

Scientists are increasingly worried we may be witnessing the start of the “sixth mass extinction” – the first to be caused by ...

Around 252 million years ago, Earth’s oceans became a lethal test of animal physiology. Nearly every marine species vanished, ...

Scientists across the globe are working to bring extinct species back to life. But do the facts measure up, or is this still ...

Tunas did not become large, fast and warm-blooded simply because an asteroid cleared the oceans of competing predators. Their defining traits appeared separately over tens of millions of years, ...

With bright feathers that look painted on, colorful birds are typically pretty and charismatic poster species for conservation. Those same colors can also put them at a higher risk for extinction in ...

Climate change threatens many plant and animal species not only when their habitats disappear as climatic conditions change, ...

Smithsonian scientist’s research illustrates how North American ecosystems are still reeling from the megafaunal extinction that closed the ice ages Jack Tamisiea During the late Pleistocene, ...

Why do beaches today have seashells from clams and snails instead of brachiopods? A new study suggests the answer lies in ...