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  1. ☆ Dmitri ☭ (yogthos@mastodon.social)'s status on Monday, 05-Aug-2019 20:12:51 UTC ☆ Dmitri ☭ ☆ Dmitri ☭

    A 3D printed arrow by mathematician and sculptor Kokichi Sugihara uses curves and angles that the brain can't register to make it look like it always points right. https://www.livescience.com/62478-optical-illusion-arrow-mirror-symmetry.html

    In conversation Monday, 05-Aug-2019 20:12:51 UTC from mastodon.social permalink

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