ALMA is the highest observatory in the world. The Chajnantor Plateau, where the 66 ALMA antennas are located, is at five kilometers above sea level. It would take you about an hour to walk that distance – straight up! Only one building in the world is slightly higher – a train station in the Himalaya Mountains in Tibet. Many big
If you hold your breath for too long, you will die. Your body needs the oxygen in the air. Without getting enough oxygen, you can’t survive. That’s why divers always take bottles of oxygen with them. After all, under water there is no air to breathe. At the ALMA observatory, it’s hard to breathe normally.