RE:The geologists are learning about Mars internal structure:
Using data on 'marsquakes' experienced by the NASA robot, were able to find evidence of three layers of crust stretching down 41 miles below the surface
The inner structure of the planet Mars has been revealed thanks to the NASA InSight lander, showing the size of the core, mantle and crust for the first time
The findings were published in three studies using NASA InSight data, from the University of Cologne, the California Institute of Technology and ETH Zurich