When you hear the phrase "20 minute video about geometry", you may not subsequently associate it with words like "riveting", or "mind-blowing". The following video might change your mind.
Here's the premise: it is geometrically possible to turn a sphere inside out without tearing or creasing it. It's certainly not simple, however, and the method that geometers use to do it is incredibly clever. Seriously, it borders on witchcraft. If you're into geeky math visualizations, I strongly recommend this video. If you don't have 20 minutes, just watch the first 2. Crazy stuff goes down.
(link courtesy of kottke.org)
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1 comment:
Kablamo! (sound of brain exploding)
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