The structure of Marss core could solve some mysteries about the Red PlanetShutterstock/AlexLMXMars may have a solid inner core within its liquid outer core, according to a new analysis of the planets seismic activity. This could help solve several enigmas about Martian geology but not everyone is convinced.Its big if true, says Simon Sthler at ETH Zurich in Switzerland, who was not involved with the research. The seismological evidence for it is rather thin.A few years ago,