Yellowstone National Park has euthanized two bears this summer after they became habituated to human food. A grizzly was put down in May for flipping dumpsters, and a black bear was euthanized in July ...

North America is home to black, grizzly, and polar bears, offering some of the best places to see them in the wild. These ...

Volcanoes are exciting and seeing molten lava is a thrill. To see active volcanoes, head to a U.S. National Park that ...