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How Big Is Earth?

Overview of the project

Project leader Bonnie Thurber, b-thurber@northwestern.edu Project location: Digital: Chile, China, Nepal, Russia, South Africa, and the United States Project description: Using only the sunlight striking the Earth and a wooden dowel, students can measure the circumference of the earth. Eratosthenes did it over 2,000 years ago. In Cosmos, Carl Sagan …

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