Electric eel dives into Europa’s ocean

Marine animals such as eels and squid inspired a new robot that US scientists are developing. The submarine robot is to explore Europa’s underground ocean. It will be self-sufficient in energy, which it harvests from magnetic fields in the water. The energy powers the robot’s equipment, including cameras.

1 Tentacles harvest electric energy from magnetic fields in the water around the robot. Gas deposit Water intake 2 The robot splits water into hydrogen and oxygen. The gases are stored in chambers. 3 The gases are lit in sequences, alternately...