The icy surface of Jupiter's moon Europa is remarkably free of craters - in fact, it's one of the smoothest bodies in the solar system. The surface is streaked with large and small cracks. Recently, the Hubble Space Telescope has observed "plumes of water vapor" above the surface of Europa. Discuss what you can conclude, scientifically, about the surface and interior of Europa based on this evidence. Be as specific as possible. Include an explanation of why the evidence supports your conclusions. Then go on to discuss the implications of your conclusions