Re: What went wrong on Mars
Mars was definitely too small to have endured one of 'The Great Bombardments'... just look at Hellas(!). Maybe that justifies it having one of the most ellipical orbits in our solar system next to Pluto.
At least we gained a moon and maybe life as we know it.
Amazing that it could still fuel the great volcanoes in Tharsis along with Olympus Mons.