3d Universe

[sassa_nf]

Proof that the universe is exactly 3d: if it is not 3d, you won't be able to tie shoelaces.

Comments

[chaource]

Physicists would say that the currently available shoelace observations are limited in precision and scale. If you could perform experiments on shoelaces of sub-atomic size, things could be different. Please give us more grant money for further research in this important area, they would say.