ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by @coryrichards | Pictured here, a climber slowly traverses a ridge en route to attempting the Everest summit. Less than two percent of climbers summit Everest without the use of supplemental oxygen. #followme @coryrichards for the visual storytelling #onassignment for #natgeo and previously unseen footage of the #culture #travel #adventure of the #Himalayas including my upcoming climb on the northeast face of #everest as I attempt a new route without the use of supplemental oxygen.」3月23日 19時02分