Could there be life under the ice on Europa?

Yes, scientists believe there is a strong possibility that life could exist under the ice of Jupiter's moon Europa. It is considered one of the most promising candidates for astrobiology in our solar system.

While we do not have direct evidence of life yet, Europa possesses the three critical ingredients required for life as we know it:

• Liquid Water: Beneath an icy shell estimated to be 15 to 25 kilometers (10 to 15 miles) thick lies a global, subsurface ocean. This ocean is estimated to be 60 to 150 kilometers deep, containing more than twice the liquid water of all Earth's oceans combined.
• An Energy Source: Because Europa is far from the Sun, its ocean is kept liquid by tidal heating—friction generated by the intense gravitational pull of Jupiter and neighboring moons flexing Europa's interior. This tidal flexing likely creates hydrothermal vents on its rocky ocean floor, similar to deep-sea vents on Earth that support thriving ecosystems without sunlight.
• Essential Chemistry: Astrobiologists believe Europa has the necessary chemical building blocks (carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur) deposited by comets and asteroids, or generated on the surface via radiation and transported downward through geological activity.