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February 07, 2010Math Mutation 120 A Pear-Shaped Planet3 minutesPlayWhat did Columbus really think about the Earth's size and shape?(Send feeback to [email protected])...moreShareView all episodesBy Erik Seligman4.87878 ratingsFebruary 07, 2010Math Mutation 120 A Pear-Shaped Planet3 minutesPlayWhat did Columbus really think about the Earth's size and shape?(Send feeback to [email protected])...more
February 07, 2010Math Mutation 120 A Pear-Shaped Planet3 minutesPlayWhat did Columbus really think about the Earth's size and shape?(Send feeback to [email protected])...more