Mars used to have water and a thick atmosphere, a bit like Earth. So what happened? Over billions of years solar wind has buffeted the Red Planet, stripping away the Martian atmosphere and causing water to evaporate. We have two spacecraft on the way to Mars for @NASA and @ucbssl to help scientists understand exactly how it happened, and how it could affect future human missions to Mars. Our twin spacecraft just a few days into their mission with a complex, multi-year journey ahead. Learn more: science.nasa.gov/mission/esc…

16 launches completed this year, putting us on par with last year's annual launch record. With more missions scheduled in the coming weeks, we're on track to break our own record once again 🚀