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The mathematical study of spaces with more than the three spatial dimensions we're stuck with, where "N" can be any number and "comprehensible" is not. It's the field that lets physicists describe the universe using 11 dimensions and then shrug when asked what they look like. N-dimensional sciences are great for string theory and terrible for interior design, as you can never find a couch that fits in a 5-dimensional living room. The main challenge is that our 3D brains keep trying to visualize things that are fundamentally un-visualizable, resulting in headaches and beautiful abstract art.
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