The popular concept has been depicted in everything from film to social media testimonials, but the real science behind the ...

North America's deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new ...

The second tallest of the Seven Summits, Aconcagua sits deep in the Andes on the western edge of Argentina. At 22,841 feet, simply standing on top is a benchmark for high-altitude alpinists.