High above the Earth, the quiet work of sustaining human presence in space continued on September 19, as Russia's Progress MS-35 cargo spacecraft completed its automated journey and docked with the International Space Station. Carrying roughly three tons of food, water, equipment, and scientific supplies, the unmanned vehicle added another link to the decades-long logistics chain that makes continuous human habitation of low Earth orbit possible. In an era of bold visions for deep space, it is often these unheralded resupply runs that form the true foundation of our reach beyond the planet.