This past December, three ÍÃ×ÓÏÈÉú´«Ã½ÎÄ»¯×÷Æ· researchers climbed up the side of the world’s highest active volcano, 22,615-foot Ojos del Salado, to understand how tiny organisms persist at one of the driest and highest points on the planet. This first-of-its-kind project may ultimately help inform the search for existing and extinct life on other planets.