enceladus

Saturn's tiny moon Enceladus shoots plumes of water vapor and hydrogen gas into space from cracks in its icy crust. Those plumes carry direct evidence of 90°C hydrothermal vents on the ocean floor — the same kind of environment where life on Earth may have started.

Beneath the icy crusts of Europa and Enceladus lie liquid water oceans that have existed for billions of years. They might be the best places to find alien life in our Solar System.