For ages, people and scientists have considered the possibility of a living organism inhabiting somewhere other than Earth. Whether it had been the moon, Mars or other farther planets, the imagination was and is always kept alive with books and movies. That possibility is always seeming to become more and more relevant with progressing technology and further examining of long distanced planets and moons. The Hubble Space Telescope is a big help to this progressing theory of life outside of Earth. Recently, scientists reported images coming from Europa, one of Jupiter's many moons, with two "large plumes" of water erupting from it's surface. These plumes, are predicted to be over 150 miles high. Under these plumes of water is a very thick crust of ice. Many scientists believe that under this ice is a very harsh ocean that may be capable of obtaining life. While the sun's rays cannot reach Europa, it is thought that heat is obtained from inside the moon due to the friction of Jupiter's gravity.
sources: http://www.space.com/23952-europa-water-geysers-life-hunting-mission.html
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