mindblowingfactz: Issac Newton stuck a sewing needle under his eyeball, pushed it all the way to the back of his eye socket, and wiggled it around to test his theory of optics.

mindblowingfactz: Issac Newton stuck a sewing needle under his eyeball, pushed it all the way to the back of his eye socket, and wiggled it around to test his theory of optics.

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from: https://ciel62.tumblr.com/post/168121950421