How do you know it's far cheaper? If it won't work, then what? Why not doing both? There are many practical reasons for exploring the universe, but IMO we huma

How do you know it's far cheaper? If it won't work, then what? Why not doing both? There are many practical reasons for exploring the universe, but IMO we human being explore because we can't help it. As technology advance the smart and fearless people will dream of using the new technologies to achieve goals previous generations can only dream of. Colonization will happen naturally: explorers come first, set up bases, recruits will arrive later to build infrastructure. Lot of people will die. If a place isn't survivable after several tries we will move to another place and repeat. It will occur over thousand years. But I have no doubt it will.