Photos by renan_ozturk | Life at Advanced Base Camp on Everest's north side, at about 21,000 feet (6,400 meters). We spent more time here the past climbing season than any other team, waiting for weather and crowds in order to accomplish our natgeo assignment. It was such a target-rich environment that it made me want to shoot 24/7, but at this altitude your body is literally dying slowly, so energy conservation is key if you're going to function at higher elevations. Looking forward to sharing the article/film/podcast later this year. Follow renan_ozturk for more images from the roof of the world.

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Photo by George Steinmetz geosteinmetz | Alexis Peltier’s plane casts a shadow over Lake Natron, Tanzania. The lake has an unusually high pH of 10, similar to pure ammonia. Under the sun of the Great Rift Valley, it can reach 120°F, giving rise to blooms of red algae. I was flying over it with my paramotor earlier that morning, and felt uncomfortable being so far offshore, as paramotor engines are notoriously unreliable. So I wimped out and went back to the beach, only to discover that my carburetor was messed up and I was a few minutes from running out of fuel. If I had gone for it that morning, I would've landed in that red soup, which is so caustic that it burns your skin. So, feeling lucky to still be walking, I asked Alexis to take me up over the lake in his Cessna, and got an even better picture! If I had to choose being smart or being lucky, I’d take lucky! To explore more of our world from above, follow geosteinmetz.

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More from National Geographic

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