A 16.5-inch-long prototype of a robot designed to explore subsurface oceans of icy moons is reflected in the water’s surface during a test in a competition swimming pool in September 2024. Conducted by NASA’s Jet Propulsion Laboratory, the testing showed the feasibility of a mission concept called SWIM, short for Sensing With Independent Micro-swimmers. The project envisions a swarm of dozens of self-propelled, cellphone-size robots looking for signs of life on ocean worlds. SWIM is funded by NASA’s Innovative Advanced Concepts program under the agency’s Space Technology Mission Directorate.
Image credit: NASA/JPL-Caltech
