Lunar soil is 45% oxygen by mass. Almost half the ground astronauts walk on is breathable air, locked inside chemical bonds with iron, titanium, and aluminum. Blue Origin's Blue Alchemist reactor heats crushed Moon rock to 1,600°C, turning it into a molten conductor. Then it runs an electric current through the melt. Oxygen ions migrate to one electrode and bubble off as gas. Iron, silicon, and aluminum collect at the other. The economics are where this gets wild. Delivering one kilogram of…