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shinysnake727 t1_j6f8s87 wrote

A fourth dimension doesn’t exist in the way you’re imagining it.

Forward and back is 1 dimensional like a line, adding left and right make it 2 dimensional, and adding up and down makes it 3 dimensional. There isn’t another spatial dimension like another direction you can go. Any direction you can go is a combination of forward, back, left, right, up, and down

Many consider time to be the fourth dimension and you obviously can’t “see” time like you can see and wrap your head around the 3 spatial dimensions.

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tdscanuck t1_j6g83nc wrote

We don't know there's no 4th spatial dimension, we just know that either we can't access it or it's rolled up really tightly.

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