NASA’s Europa Clipper is using Mars as a cosmic slingshot to get a speed boost on its journey to Jupiter’s icy moon, Europa. While zipping past at 884 km, scientists will test its instruments before it heads off on its 2.9-billion-kilometr trek. But Europa isn’t the only icy world making waves—new data suggests Jupiter’s Callisto also has a hidden ocean, and Saturn’s Enceladus has a mushy zone under its ice shell that might be hiding alien microbes. Beyond the frost line, the search for life is heating up! 🚀❄️👽