View full lesson: ed.ted.com/lessons/how-simple-ideas-lead-to-scientific-discoveries Adam Savage walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed -- Eratosthenes' calculation of the Earth's circumference around 200 BC and Hippolyte Fizeau's measurement of the speed of light in 1849. Lesson by Adam Savage, animation by TED-Ed.

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