They're not mutually exclusive, and it's not getting any less crowded on earth. It can seem like a tremendous diversion with the potential to abdicate any urge

They're not mutually exclusive, and it's not getting any less crowded on earth. It can seem like a tremendous diversion with the potential to abdicate any urgent need to address our problems at home, operating under the assumption that we'll replace it. But that's obviously flawed thinking, since anything we find nearly habitable will always be a poor substitute for where we evolved to live.