An artist’s concept shows the two ESCAPADE spacecraft at Mars. The ESCAPADE mission is the first to coordinate two spacecraft in orbit around a planet other than Earth. Credit: James Rattray/Rocket Lab USA Mars looks very different today than it did billions of years ago. Scientists believe the planet once had flowing water, a thicker atmosphere, and a much warmer climate. Now the Red Planet is frigid, dry, and surrounded by only a thin layer of air. Researchers think the biggest reason for