The first time you may have heard the term ‘dwarf planet’ was when Pluto got demoted to one in 2006 (RIP). However, we actually have six in our Solar System. Pluto, Ceres, Makemake, Haumea, and Eris ...

Like much of Mars, the butterscotch plain is inhospitable, empty, ancient, and, when it comes down to it, pretty dull. But a few hundred meters to the south, over a shoal of low, uneven hummocks ...

So too each rover uses its three-jointed arm to wield equipment including a camera and a tool for grinding into Mars rocks. Rock-breaking brings up the essential reason to muse over these robots ...