> no matter how badly we screw up Earth, Really? Our weather can potentially get incredibly violent and completely obliterate any structure we can conceivably

> no matter how badly we screw up Earth, Really? Our weather can potentially get incredibly violent and completely obliterate any structure we can conceivably make. There's a limit on how badly we can mess up. I think we should be focusing on establishing a space industry (or moon bases) before we even think about mars. And at that point, unless it's for hiking, we might find that we don't need planets anymore.