Editor’s Note: “Close Encounters: Tourists in the Wild” on The Whole Story with Anderson Cooper takes us to Yellowstone National Park, where visitors behaving badly can lead to dangerous encounters ...

Step into Białowieża Forest, one of Europe’s last and largest remaining primeval forests. This serene footage captures wild ...

Wild mammals on Earth are in big trouble. In the cold light of ecological arithmetic, they barely register anymore. Of all the mammalian biomass on the planet, just 4% is still wild. The rest — us and ...

The European bison, which was hunted to extinction in the wild in the early 20 th century, now roams parts of Eastern Europe thanks to sustained conservation efforts over decades.

You’ve come across a bison in the wild. It’s looking at you. Do you know what to do next?