Hmm, well, when you look at object you reconstruct 3d item from 2d image; it could be considerably more compact to store the 3d objects than 2d images. Think 'demoscene' where a lot of 3d imagery is packed into 64 kilobytes.

What I find most odd is the immense diversity of human thought... it's almost as if people have some thinking substrate in their head, the cortical columns replicated all over the brain, and that substrate invented the ways to think and organize itself, on it's own (to the point that early brain damage is so amazingly compensated for). Usually same areas take on same functions, and there may be tweaks to properties of substrate, but all in all it's as if brain invents the ways to think - different ways.