Could Life Exist Beneath Europa's Ice?
One of Jupiter's moons hides more water than every ocean on Earth combined, sealed under a shell of ice. Europa is only about the size of Earth's Moon, yet it has become one of the strongest candidates for life beyond Earth in our solar system. Like Earth, it is built from an iron core, a rocky mantle, and a layer of salty water. Unlike Earth, its surface temperature never climbs above roughly -256 Fahrenheit (-160 Celsius) and can fall to around -364 Fahrenheit (-220 Celsius). Recent measuremen...