Seismic waves have been for long time the only messenger
reporting on the
conditions deep inside the Earth.While global
seismology provides amazing
details about the structure of our planet, it is
only sensitive to the mechanical
properties of rocks and not to their chemical
composition.In the last several years
KamLAND and Borexino have started measuring
anti-neutrinos produced by
Uranium and Thorium inside the Earth. Such
"Geoneutrinos" double the number
of tools available to study the Earth's interior,
enabling a sort of global chemical
analysis of the planet, albeit for two elements
only. I will discuss the results of these new measurements and put them in the
context of the Earth Sciences.