North Pole Marathon: Where the bitter cold slows you down and thoughts of polar bears make you go faster
April 17, 2018, 12:58 p.m. by Michael d'Estries
Competitors from around the world line up on an Arctic ice floe to tackle one of the world's most difficult 26.2-mile races.
Meet 7 regular people running great distances to support a cause
March 29, 2018, 2:57 p.m. by Jenn Savedge
These runners are using their sport to change the world.
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Record-breaking 'monster wave' detected in Southern Ocean
How early humans created the paintings found in France's Chauvet cave
Coyote finds old dog toy, acts like a puppy
12 plants that repel unwanted insects
How much can a 2,000-mile hike on the Appalachian Trail change a man? Take a look