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by tines 426 days ago
A mobius strip does!
1 comments
bibanez 425 days ago
A mobius strip made out of paper has 2 sides, the usual one and the edge.
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tines 417 days ago
You can make it out of some other material that you can smooth, i.e. so that it doesn’t have edges.
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tines 417 days ago
Come to think of it, doesn't a sphere have only one side?
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WJW 425 days ago
How about things like Klein bottles that have no edges? (Although I guess that unlike a Mobius strip it's not possible to make a real one here on Earth so the quote from OP still holds)
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