This question already has an answer here:
I came up with this line somewhere:
To properly experience $n$ dimensions the retina of the organism should be at least of $n-1$ dimensions.
And human eye has $2$ dimensional retina, so we can experience at most 3 dimensions properly.
Now my question is:
Do more than 3 dimensions exist?
What is the proof that 'there exist only 3' or 'more dimensions do exist'?