Say what you will about Homo sapiens, but you can’t argue that we’re a versatile species. On Earth, we can survive a decent swath of both heat and cold. We eat a mind-boggling variety of flora and fauna, and can radically change our diets according to need or mood. We can live in deserts, forests, tundras, swamps, plains, mountains, valleys, shorelines, and everything in between. We are generalists, no question.