Once nearly extinct in many parts of the western United States, wolves are staging a remarkable comeback. From the mountain ...

In 1978, renowned ecologist Dan Janzen jumped into a ravine in Costa Rica, broke three ribs, and spent the first month of the ...

Over millions of years, humans and their ancestors evolved alongside a host of terrifying predators—some so formidable, ...

Kenya’s 800,000 refugees reflect a global trend that could affect over a billion by 2050, without urgent climate action.