Deep in the Arctic, engineers have proposed a futuristic “Living Dome” concept—an enclosed biome designed to protect and sustain plant life in one of the harshest climates on Earth. Valued at an estimated $500 million, the structure would shield an ancient-style forest ecosystem from blizzards, subzero temperatures, and months of darkness. At the core of the concept is a liquid algae-based climate system. Algae panels embedded within the dome’s walls would absorb sunlight during the limited dayl