Earth looked much different not just millions, but even decades and centuries ago. Many animal species that once existed are nowhere to be found. From human activity to climate change, new animals ...

Until now, scientists have only known about the animals from fossils. But they suspected the creatures might still be alive, ...

No other animal is as inexorably linked with extinction as the dodo, an odd-looking flightless bird that lived on the island of Mauritius in the Indian Ocean until the late 17th century. The arrival ...

How scientists (and the rest of us) are finding 16,000 new species a month.