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

The United States has the most horses in the world, with a population of more than 10.3 million animals. That's roughly 18% of all horses. The country is also home to more than a hundred registered ...

Every American red wolf alive right now is descended from only 14 canids. In the 1970s, humans drove the red wolf to the brink of extinction.... The American red wolf is endangered. These 'ghost genes ...

NORFOLK, Va. — The North Atlantic right whale is one of the most endangered marine mammals on the planet. The Navy says it is dedicated to is doing its part to protect this species on the brink of ...

The Trump administration wants to make economic impacts a factor in what was previously a science-based decision on what's ...

Birds are vanishing at an alarming rate. Since the Late Pleistocene, thousands of species have disappeared forever. Estimates suggest between 1,300 and 1,500 bird species are extinct.