This will help you grok the weirdness of quantum physics

One picture to grok them all.

Tell me: do you see an old woman or a young woman in the picture below?

My Wife and My Mother-in-Law” is a sketch created by British cartoonist William Ely Hill in 1915 and published in Puck magazine with the caption "They are both in this picture - Find them." In fact, the sketch contains both a young wom…

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