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.
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Skin printer wipes years from your face
A handheld printer for the face and hands is on show at the CES tech expo in Las Vegas.
