Title: Curiosity on Mars: NASA's search for habitable environments. Scientists have found life in surprising places: in rocks a mile under the ocean floor and in scalding pools of hot water. In comparison, Mars may not be such a long shot. Martin Fisk, Oregon State University marine geologist, is part of the NASA team that analyzes the Martian landscape for places where life existed in the past or could exist today. In addition to describing the ongoing voyage of Curiosity, he probes the possibility of life in other parts of the universe.