The nights are long inside a tent 5,300 meters above sea level at the snout of Nepal's Yala Glacier. At 8:00 P.M., after a meal of Nepali dal bhat (lentils and rice), the 10 members of our expedition take refuge against the cold in sleeping bags inside the small tents that make up our temporary camp. Falling asleep is tough because the low oxygen concentration fools our bodies into increasing their heart rates. As a consequence, I spend many overnight hours listening to distant sounds of thundering avalanches and cracking ice, contemplating whether to leave the sleeping bag to pee outside and what not to forget the next day. As soon as the sun rises, the camp is bustling, and we are on our way up the steep glacier to install special instruments at 5,600 meters.