Engineers at NASA's Jet Propulsion Laboratory recently tested prototypes of miniature, self-propelled robots designed to explore the hidden oceans of distant moons like Europa, Jupiter's icy moon.

NASA tests cellphone-sized underwater robots for future ocean world missions (video)

Source: space
Source Link: https://www.space.com/space-exploration/missions/nasa-tests-cellphone-sized-underwater-robots-for-future-ocean-world-missions-video