A new study found that grizzly bears have had to change their movements across the Canadian Rockies, becoming more constrained over time as they avoid human development like coal mines, highways, ...

The last grizzly bear seen in California was 101 years ago. A new study found that reintroducing the mammal into the state’s mountainous wilderness is feasible. California could potentially host over ...

This story originally appeared on Vox and is part of the Climate Desk collaboration. In the early 1900s, long before smartphones and selfie sticks, tourists flocked to Yellowstone National Park—not ...