Gerard K. O'Neill

Gerard K. O'Neill was an American physicist and space advocate known for proposing the idea of space habitats—large, artificial environments in space that could support human life. He envisioned constructing massive, cylindrical colonies that could orbit Earth, providing space for living, working, and farming, potentially alleviating Earth's overpopulation and resource issues. His work combined physics, engineering, and vision to inspire discussions about humanity's future in space exploration and colonization.