Eratosthenes and Aristarchus

We take for granted that science is quantitative.  But the early Greeks were primarily interested in philosophical argument rather than careful measurement.  This began to change in the 3rd century BC when two of the great figures in early science came on the scene.  Eratosthenes would measure the circumference of the Earth, while Aristarchus would be even more ambitious and would attempt to measure the distance to the Sun and the Moon.

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Music Credit: Folk Round Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License