How to Sleep In Extreme Places
Published 31 Jul 2018, 13:05 BST, Updated 31 Jan 2019, 15:29 GMT

A dedicated Antarctic tourist sleeps on a deckchair during snowfall close to the Amundsen Sea.
Photograph by Colin Monteath, Minden Pictures
An exhausted fisherman takes a nap on a commercial fishing skiff in Bristol Bay, Alaska.
Photograph by Corey Arnold
An Italian explorer settles down into his sleeping bag with the majestic Matterhorn in the background.
Photograph by Robbie Shone
Farmers rest by their truck after loading straw in Delaware County, Iowa.
Photograph by JAMES A. SUGAR, National Geographic Creative
An American soldier sleeps following night duty at a frontline base in Afghanistan’s Korengal Valley.
Photograph by Tim Hetherington, Magnum
Passengers, mainly construction workers, catch some rest while returning home to northeast India after working in south, where the wages are better.
Photograph by Claire Rosen, National Geographic Creative
Climber Ivo Ninov rests while suspended against the face of El Capitan in Yosemite National Park.
Photograph by Jimmy Chin