Social media treats the tree-popping phenomenon as a sign of the apocalypse, but Indigenous peoples have long used the sound of cracking timber to mark the passage of winter.

The town of Page, Arizona, sold 500 acres of land near the Colorado River to a private developer. Some locals fear the facility will drain the region's already stressed water supply.

Running with a baby in a chest carrier can also be dangerous. The stunt serves as a reminder that racing with a baby isn’t just a bad way to nab a course record—it’s also a serious safety hazard.

One spring showed traces of several pharmaceuticals, including an antibiotic, an antifungal, an anticonvulsant, an antidepressant, and a diabetic drug. Such contaminants could pose a threat to the canyon’s already fragile ecosystem.

A new research project suggests the pioneers of 1924 might have had better equipment than you think.

Rescuers battled high winds to reach the surviving climber, who spent several hours on a precarious, rocky ridgeline.

A half-mile-long slackline was hung across Telegraph Canyon, a recreational area located about 60 miles east of Phoenix in the Sonoran Desert.

The triathlete went missing while swimming off the coast of California during her weekly swim club meeting. Eyewitnesses report having seen a shark in the water shortly before her disappearance.

At age 85, when most are enjoying retirement, the civil rights activist began serving as a park ranger in California. For the following 15 years, she continued in the service of public lands, giving historical talks and tours.

If passed, the Utah Republican’s proposal would have rescinded legislation that protects and maintains the boundaries of national parks as federal lands. Yet Senator Mike Lee told Outside, “selling national parks was never on the table.”