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The Universe Isn't Flat - It's Four Dimensional

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By Scott Schlimmer, published Mar 21, 2007
Having trouble picturing the fourth dimension? Try making a Mobius strip. Take a strip of paper, twist it once, then tape its ends together. Try drawing a line from beginning to end. Your line will find its way to the flip side of the paper.

Credit: David Benbennick
Copyright: David Benbennick
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