Scientists from NASA, the SETI Institute and other institutions will study microscopic life forms in some of the highest lakes on Earth atop a South American volcano to learn what life may have been like on early Mars. From Oct. 27 to Nov. 23, scientists will conduct field tests to examine life forms in several lakes, including the Licancabur volcano crater lake, at nearly 20,000 ft. in the Andean Altiplano on the border of Bolivia and Chile.