Reinterpreting the Core

There are things we know about the Earth's Core and lots of things that we don't.  We have a good idea about it's composition (from meteorites) and about its state of matter (from seismic evidence).  Some new research from Spain suggests that there is more to the Core's structure than had been previously thought in that there are two different hemispheres to the Core that are differentiated by the structure of the iron in the core.  The data also suggest that the core is moving. 

What do you think about the evidence?

BBC News story