Earth looked much different not just millions, but even decades and centuries ago. Many animal species that once existed are ...

Sometimes an animal long thought to be extinct reappears decades or centuries later, shocking scientists! Join Hank Green for a look at seven species that we thought were gone forever... but are back ...

Brandon Ballengée’s ‘Frameworks of Absence’ (2006–ongoing) in the Ronald Feldman Fine Arts booth at the 2015 Armory Show (photo by Jillian Steinhauer/Hyperallergic) (click to enlarge) The animals have ...

Curitiba, Brazil used to be forests, wetlands, fields and streams before it was developed over the last half-century. Gilberto Jacob via Unsplash As new species are discovered around the world, others ...

Scientists have managed to find a rare insect after it supposedly went extinct more than two decades ago. The Behningia baei, a species of mayfly that hasn't been seen since 2002, were rediscovered in ...

The Andean condor has been threatened with extinction for decades. At one time, the condor was considered extinct in ...

Scientists have successfully sequenced the genome of the long-extinct woolly rhinoceros from an unusual place: the stomach contents of a naturally mummified Pleistocene wolf pup from Siberia. As its ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. There’s an important concept in evolutionary biology called ...