Previous theories, most notably the Central Governor Model developed by researchers at the University of Cape Town and ...

When she's not hiking, camping, or road-tripping with her dog, Melanie Haiken writes about nature, science, travel, health, and the outdoors for National Geographic, Smithsonian, BBC, Sierra, and Afar ...

From toenails to bodily functions, there are some questions about ultramarathons that we've been too afraid to ask. That is, ...

Practice, practice, practice.” This quip popped to mind when I was reading a new study about the caloric requirements of ...

“I’ve seen running help immigrants and refugees feel a sense of belonging in the U.S. Running provides a place where, with ...

Stand with your feet hip-width apart and a light dumbbell in each hand with your palms facing towards your body. Keeping your ...

According to local reports, Baumgartner was piloting a paramotor —an ultralight aircraft that uses a wing-like parachute—when ...

Two years after our colleague argued the merits of the tiny dogs, a glacier rescue in Switzerland adds considerable clout to ...

Officials in Arizona and Colorado have closed huge swaths of parkland to visitors after lightning-sparked blazes destroyed ...

More than 300 tremors were recorded below Mount Rainier over the course of three days. Scientists say they were too weak for ...

By far the most common cause of death among trail runners is cold weather and hypothermia. This isn’t surprising, especially ...