Artemis IV engines called ready as SkyFall demo previews Mars helicopters

NASA's administrator says engines intended to help return American astronauts to the Moon are ready for Artemis IV. The administrator also shared a JPL SkyFall demo presented in Huntington Beach, saying the mission would deploy three helicopters in midair at Mars, building on Ingenuity. They would use ground-penetrating radar to search for subsurface ice, and the effort could potentially help identify landing sites for future Mars missions.