One possible answer is eating, since a digestive tract would separate a 2-dimensional being into 2 pieces.



We're getting a good idea of what dimension is. In our universe we have 3 dimensions in space. According to our definition this should mean a point can be described by 3 numbers. Indeed if we think of a point being on a grid



then 3 numbers will describe a point uniquely.

Stop for a moment and think, can there be more dimensions beyond 3?

to find out!

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