Exploring Alien Oceans: NASA engineers have successfully tested a prototype underwater robot designed for the SWIM project (Sensing With Independent Micro-Swimmers), aimed at exploring the subsurface oceans of Jupiter and Saturn's moons. The current prototype, measuring 42 cm in length and weighing 2.3 kg, demonstrated its ability to autonomously navigate, maintain course, and follow a designated path. The goal of the SWIM project is to send a swarm of tiny robots to explore the ocean beneath Europa's icy crust. These robots will investigate the water's properties (temperature, salinity, pH, pressure) and search for potential biomarkers, helping to answer the age-old question of whether life exists beyond Earth. The prototype successfully navigated a 25-meter pool at Caltech, and future versions will be three times smaller, with miniaturized components and advanced underwater acoustic communication for data transmission and positioning. This breakthrough in autonomous robotics could open doors to the search for extraterrestrial life, as a swarm of these mini-robots will be able to explore vast amounts of water—up to 86,000 cubic meters—in just two hours! NASA’s SWIM mission could ultimately provide valuable insights into the habitability of Europa’s ocean, one of the most promising places in our solar system to find life