On every crewed mission, NASA packs pouches of a potentially life-saving liquid in its cargo, known as IV (or intravenous) fluid. A simple mix of sodium chloride and purified water, it can treat up to 30% of medical conditions in flight, resolving things like dehydration, burns, and more. Crewed missions beyond low Earth orbit into deep space could last up to three years and may require IV fluid for crew health. However, current IV fluid shelf life is limited to 16 months. To avoid the complications of stocking a perishable supply of prepacked IV fluid, experts at NASA’s Glenn Research Center in Cleveland have created a technology that can transform water into IV fluid on demand. They now are preparing to test the latest, lightweight version of the system aboard the International Space Station.…