I’ve heard about this idea a lot, but on the flip side it doesn’t seem to make sense. Us as 3D beings can’t naturally encounter 2D things, just representations of them (drawings etc), but nothing in the real world that has just 2 dimensions. So how could it be possible for there to be 4 (or more) dimensions?
In: 3
Here’s how I understand it.
Consider a piece of paper. Because you are huge, you can only move forward/backward and left/right if you walk on it, effectively making it two-dimensional in space for you, with the third dimension being squeezed in space to the extent that it’s negligible.
Unless you’re a tiny flea. Now you can perceive the extra dimension of the paper and you can climb up or down it’s edge. Only if you are, yourself, comparably sized on that tiny scale.
That’s where the extra spatial dimensions are. We can perceive 3 because we are huge within the scales of those dimensions. The additional dimensions are squeezed into tiny spaces within the fabric of the universe (think plancks length… 1.6×10^-35 m) and we can’t perceive them unless we shrink down to that size.
Like Ant man does.
Edit… How small is plancks length? An electron is 2×10^-10 m. So its 10 million billion *billion* times smaller. Than a fxxxing *ELECTRON*. Hence even electrons are only capable of moving in 3 dimensions…
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