Russia’s massive aerial assaults on Ukraine came days after President Trump refused to impose additional sanctions on Moscow if it didn’t sign an immediate, 30-day cease-fire.

A 92-year-old man is now the oldest person on record to have conquered the Grand Canyon's 24-mile, rim-to-rim hike. Guinness World Records confirmed the feat on Tuesday, about two months after ...

Dam maintenance and non-native fish reduction efforts led the government to reject an environmentally restorative flood in ...

Black Lives Matter street murals appeared in cities across the U.S. following the police killings of George Floyd, Breonna ...

Shows intense demolition derby action captured through dynamic FPV aerial drone footage for immersive viewing.

In the 1970s, Barbara and Bradford Washburn spent seven years mapping the entire Grand Canyon. Photograph by Charles O'Rear, Nat Geo Image Collection For nearly half a century, the pair mapped the ...

Hike up the east wall of Zion Canyon to a deep, hidden, hanging canyon. Note: This trail begins at the Weeping Rock shuttle stop, which is where the hike to Hidden Canyon and Observation Point also ...

As May unfurls across northern Arizona, the symphony of spring grows richer each day. The ponderosa forest awakens with the ...

Enlarging Shasta Dam would deliver more Sacramento River water to Central Valley farmers but there are downsides for a tribe and endangered salmon.

Rescuers navigated rough terrain in a dark Utah canyon to find a lost hang glider who had been blown off course by strong winds, officials said. Davis County Sheriff's Search and Rescue on ...

The Shasta Dam project would deliver more water to Central Valley farmers but a tribe could lose sacred sites and endangered salmon could lose habitat.

A free falling skydiving instructor risked his life to save one of his students after a parachute malfunction in midair, according to investigators in North Florida. Both survived the incident ...