Why do scientists think there might be life on Europa?
Scientists think that life may exist on Europa because there is evidence that liquid water may exist beneath its icy surface. Europa is pushed and pulled by the high gravity of Jupiter as well as by the gravity of Jupiter's other moons. ... So, there may be lakes and oceans of liquid water on Europa.
Are there signs of life on Europa?
Robots may have to dig relatively deep on Jupiter's icy moon Europa to have a shot of finding signs of life, a new study suggests. Scientists think Europa harbors a huge ocean of liquid water beneath its icy shell. ... As a result, Europa is generally regarded as one of the solar system's best bets to harbor alien life.