Layla can't help but smile in return, though she shakes her head slightly. "This world definitely wasn't the origin for humans in this universe - it was originally just used as a spaceport, and developed a stable population over a few generations. It took a bit of digging, but I managed to turn that up while I was looking into the history here. I meant more - the kind of environment we can live in is actually pretty narrow, if you're looking at the possible range of planets, yeah? Temperature bands, atmosphere, that kind of thing. So that limits the kind of life that would thrive on a planet we'd find habitable."