To change where the menu appears change the left and top values of the divCont in the stylesheets, it's currently placed relative so you can place this menu in tables or similar if you want. Change the text colors and size in the A.clMain and A.clSubb classes.
Scientists believe that planet Mars, like the Earth, has a largely iron core.
But without seismological evidence, the dimensions, composition, and physical state of the core of Mars have been difficult to assess. The new instrumentation is capable of achieving pressures in excess of conditions inside Mars' core. Their conclusion is that if FeS is a major component of the planet's core, it is in the FeS IV structure. The discovery of the FeS IV form bears directly on calculations of the depth of Mars' core-mantle boundary. Such calculations depend on density profiles of the mantle and core.