Striding Edge arete Helvellyn mountain peak and Red Tarn corrie lake, Lake District, Cumbria, England, UK

Striding Edge arete and Helvellyn mountain peak, Lake District, Cumbria, England, UK

Cosmique Arete on Aiguille du Midi, Chamonix, Rhone Alps, Haute Savoie, France, Europe

Statue of Virtue, Arete, on the facade of the Roman Library of Celsus dating from between 110 and 135 AD, at the archaeological site of Ephesus, Anatolia, Turkey, Asia Minor, Eurasia

Mont Blanc from the Aiguille Du Midi above Chamonix, France, with climbers on the Cosmiques Arete.

Mont Blanc from the Aiguille Du Midi above Chamonix, France, with climbers on the Cosmiques Arete, climbing the ladder to access the cable car station.

Climbers on the arete leading up from the Vallee Blanche to the Aiguille Du Midi above Chamonix, France.

Climbers on the arete leading up from the Vallee Blanche to the Aiguille Du Midi above Chamonix, France.

Mont Blanc from the Aiguille Du Midi above Chamonix, France, with climbers on the Cosmiques Arete, climbing the ladder to access the cable car station.

Mont Blanc from the Aiguille Du Midi above Chamonix, France, with climbers on the Cosmiques Arete.

Climbers on the arete leading up from the Vallee Blanche to the Aiguille Du Midi above Chamonix, France.

Rugged mountainous scenery Larson Harbour, off Drygalski fjord on the South East tip of South Georgia, in the Southern Ocean.

The rapidly receding Glacier de pre de Bar in the Mont Blanc range, Italy.

Climbers ascend Helvellyn from Striding Edge in the Lake District National Park, Cumbria, England, United Kingdom, Europe

A woman walking on Crinkle Crags in the Lake District National Park, Cumbria, England, United Kingdom, Europe

A woman wearing a red tank top and striped pants climbs The Rapture (5.8) on Lower Gibraltar Rock in Santa Barbara, California on. The Rapture is a very nice and unbelievably well protected route on the left arête of Lower Gibraltar Rock.

A woman wearing a red tank top crimps down on a small hold while climbing The Rapture (5.8) on Lower Gibraltar Rock in Santa Barbara, California. The Rapture is a very nice and unbelievably well protected route on the left arête of Lower Gibraltar Rock.

A woman wearing a tank top and striped pants reaches for chalk while climbing The Rapture (5.8) on Lower Gibraltar Rock in Santa Barbara, California. The Rapture is a very nice and unbelievably well protected route on the left arête of Lower Gibraltar Rock.

A woman wearing a red tank top and striped pants clips a quick draw while climbing The Rapture (5.8) on Lower Gibraltar Rock in Santa Barbara, California. The Rapture is a very nice and unbelievably well protected route on the left arête of Lower Gibraltar Rock.

A woman wearing a red tank top and striped pants climbs The Rapture (5.8) on Lower Gibraltar Rock in Santa Barbara, California. The Rapture is a very nice and unbelievably well protected route on the left arête of Lower Gibraltar Rock.

A woman wearing a red tank top and striped pants climbs The Rapture (5.8) on Lower Gibraltar Rock in Santa Barbara, California. The Rapture is a very nice and unbelievably well protected route on the left arête of Lower Gibraltar Rock.

Monica Wang climbing Steve's Arete 5.11 on Mt. Lemmon near Tuscon, Arizona.

Beth Rodden moves up the arete on Aerial, a 5.11b climb, on Donner Summit in California. Beth Rodden is one of the world's leading climbers.