I’m very much a Moon person but I’ve written a bit about Mars over the years as well, highlighting a few key aspects about the red planet’s exploration which I thought aren’t discussed as much or in detail.NASA explores MarsA comparison of three generations of NASA Mars rovers. These are flight-spares inside NASA JPL's Mars Yard testing area. The Sojourner rover’s twin is front and center, a Mars Exploration Rover spare is on the left, and the Curiosity twin is on the right. Image: NASA /…