One possible place with conditions similar to early Earth is Enceladus, one of Saturn's moons. Enceladus is believed to have a subsurface ocean beneath its icy crust, which could potentially harbor microbial life. The moon also has geysers that shoot water vapor and other materials into space, similar to hydrothermal vents on early Earth that supported early life forms. Additionally, Enceladus has a thin atmosphere composed mostly of water vapor, carbon dioxide, and nitrogen, similar to the early Earth's atmosphere. This moon is therefore of great interest to scientists studying the origins of life in our solar system.
