“In the summer of 2016, I went on a scientific expedition in the Ladakh region in northern India,” recalls Sanjay Limaye, a senior planetary scientist at the University of Wisconsin-Madison. “Many Israelis travel in Ladakh, a very high region in the foothills of the Himalayas. My purpose was to examine whether there is life in the acidic springs there – but all the springs we examined turned out to be completely nonacidic. In short, it wasn’t a very exciting trip for me. On the last day, however, we arrived at the salt lake of Tso Kar, not far from the capital, Leh, at an elevation of perhaps 5,000 meters above sea level.