Why We Must Flee the Planet: The Geometry of Earth is All Wrong

Our planetary home is the wrong shape, says SETI Institute's Seth Shostak. A sphere has less surface area than any other form of the same volume. Gerald O'Neill's proposed mammoth, rotating aluminum cylinders in orbit have a very low tonnage-to-terran ratio. Rather than crowding a few billion people onto the moon, for example, where residents... Space.com