Materials Similar to The Round Earth and Christopher Columbus
- 48%: The Exploration of the Earth's Magnetosphere
- 39%: Nova: Origins
- 38%: Magnetospheres and the Universe
- 38%: Hurricanes: The Greatest Storms on Earth
- 36%: The Great Magnet, the Earth
- 33%: Significant Figures and Rounding Rules
- 33%: Center for Near Earth Object Studies (CNEOS)
- 31%: Astronomy of the Earth's Motion in Space
