Lawmakers in Congress have advanced a proposal to strip protections from gray wolves across the contiguous U.S. amid a push by Republicans for broad changes to the Endangered Species Act

A federal judge has reinstated an oil and gas lease on land in northwestern Montana that's considered sacred to some Native American tribes in the U.S. and Canada

Grizzly bear hunts planned in the Northern Rocky Mountains have been blocked by a U.S. judge who says the government failed to show the animals have recovered from widespread extermination

Judge restores protections for grizzly bears around Yellowstone National Park, blocking planned hunts in Wyoming, Idaho

Will Smith turns 50 on Tuesday and will jump into the milestone with a bungee plunge into a gorge near the Grand Canyon from a helicopter

A national park in Hawaii has reopened after being closed for more than four months because of Kilauea volcano's latest eruption, which caused widespread damage to park infrastructure and dramatically changed its landscape

A national park in Hawaii has reopened after being closed for more than four months because of Kilauea volcano's latest eruption, which caused widespread damage to park infrastructure and dramatically changed its landscape

Officials are preparing to relocate six to eight gray wolves from the mainland to Isle Royale National Park

U.S. officials are recommending approval of a plan to block new mining claims for 20 years on public lands in the mountains of Montana north of Yellowstone National Park

Yellowstone National Park officials have ticketed a man caught on video wandering close to Old Faithful geyser