Lesson Plan

Nasa: From Stargazers to Starships: The Round Earth and Christopher Columbus

Curated by ACT

Despite popular myth, people of the 15th century actually realized that the earth was round. Some scientists had even estimated the size of the Earth. Here's an interesting explanation from a section of an online textbook on the reasoning of Columbus.

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Classroom Considerations
  • Knovation Readability Score: 4 (1 low difficulty, 5 high difficulty)