Europa has Ice on its surface and scientist are speculating if its possible to have life underneath. They speculate that like on Earth, water lies underneath all that ice and water is the based of many life forms. On June 2010 during the Cassani-Huygen mission reported that there is methane producing organism however it may be due to non living chemicals or meteorological interference. The Cassini-Huygen nission was not equipped with biological equipments so its still unknown. There are moons on every planet. Our moon is not called "Moon". Its called Luna. How are you even going to #facts if you don't even know about moons?