Worlds Beyond the Poles: Physical Continuity of the Universe by F. Amadeo Giannini (1959) argues that the Earth is a stationary, flat plane extending infinitely beyond the North and South Poles. Giannini proposes that "navigable causeways" connect our world to other celestial bodies, suggesting a physically continuous universe where human life exists far beyond traditional boundaries. The text argues that there is no end to the Earth's surface and that "gravity" is not as commonly understood, but rather a "simple and understandable physics" based on continuous, dense material.