Mars has water.  This statement was in question 15 years ago, but now it’s an accepted idea backed up by proof obtained by the last three Mars rovers.  Not only does Mars have water now, but it had significantly more water in the past, as evidenced by the geological features seen throughout the planet.  Ancient lake and river beds, water erosion, sedimentary rocks, all things that highlight once wet areas. How much water did Mars have? Where did it all go? A team of astronomers from NASA’s Goddard Space Flight Center in Greenbelt, Maryland has been searching for answers, by looking...