Could there be fossils on the surface of Europa, Jupiter’s storied moon that Arthur C. Clarke harshly warned Sapiens not to attempt a landing on? NASA is building an antenna that will take that long journey aboard its Europa Clipper, a spacecraft that will conduct detailed reconnaissance to see whether the icy orb could harbor conditions suitable for life. Scientists believe there’s a massive salty ocean beneath Europa’s icy surface that reaches 100 kilometers below the base of the ice –a depth 10 times greater than the Marianas Trench.