we know more about mars then whats down there, in the last few years we discovered new speices never seen before, over 30 new ones, and we were lucky, they were either on the durface to escape things or there bodies were floating on the surface, there must be millions more speices, and we never went to the deepest part of the ocean (bottum of the marianas trench) while we have sent things to mars, does anyone even care about our own planet anymore?