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Comment by causality0 | Hacker News Reader

That last point is quite interesting. I'm having some trouble extrapolating that up into higher dimensions, identifying what limits of the human body would be eliminated by a fourth spatial dimension.

Edit: For some reason using a whole comment to say this got me muted from commenting at all, so I'll put it in an edit: Damn, that shoelace thing is really cool.

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> I'm having some trouble extrapolating that up into higher dimensions, identifying what limits of the human body would be eliminated by a fourth spatial dimension.

That's precisely why Flatland and the Planiverse are such interesting books. Making the step from 2D observing from 3D gives you a little bit of an intuition of how a 4D being would look at us as well as to how a 3D being would look at a 4D one.

IIRC, Rudy Rucker’s Realware had some interesting stuff happening in higher dimensional spaces with humans kidnapped by high-d beings. As all his books, a very fun read.

My favorite was 'The hacker and the ants'.

You couldn’t tie your shoelaces in 4D because the laces would just slip around each other.

Aren’t some organic molecules effectively knots? Though I imagine there are plenty of alternatives.

You can't knot 1-dimensional curves in 4-dimensions, but you can knot 2-dimensional surfaces.

Therefore, a 5D being ties their shoes with 3D universes.

New twist on the simulation argument: we're living in the shoelaces of someone's high-tech shoes.

A 6D being even! We live from aglet to aglet.

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