Seven years ago, the US military had a dilemma: its service members, based in the world’s harshest and most resource-deprived locales, needed access to clean drinking water. But there wasn’t a ...

The U.S. military asks them to create water filtration technology designed for troops. Global health nonprofits seek technologies from them to help filter safe drinking water in developing countries.

Physical water filters—the kind you pump water through—are popular because they’re reliable and easy to use. But they’ve always had a major drawback: the inability to catch viruses, which is ...