NASA’s Mars Odyssey spacecraft has discovered evidence of significant hydration near the Martian equator. Mars Odyssey spotted possible water ice in the Medusa Fossae area of Mars, which is in an equatorial region of the planet to the lower left in this view. Image credit: Steve Lee, University of Colorado / Jim Bell, Cornell University / Mike Wolff, Space Science Institute / NASA. Dr. Jack Wilson of the Johns Hopkins University Applied Physics...