Imagine watching Earth rise from your home at Mars Base Alpha, a place bustling with mining robots, research pods, and cargo landers. Together they are building the next human neighborhood 140 million miles from the original home planet — on a new home planet. Years earlier, robots scoured Mars for ice deposits and usable regolith to produce oxygen, water, and building materials. Solar panels, ferried on cargo flights from Earth, generated power to fuel automated construction. Now, Mars' first human inhabitants are conducting research and growing food in biodomes. They're eating 3D-printed beef and pizza. They're hosting tourists. They're even...