How to Turn a Sphere Inside Out

I absolutely have to link to this video. It is about how to turn a sphere inside out. I guess it has to do with the much talked about field of math called topology which no layman really understands or knows about. Don't know what practical applications this one might have but that's not why we do math, do we?

In any case, the video is a good study of how even notoriously bizarre mathematical ideas can be made accessible if only you do it the right way.


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