It takes about 0.2 seconds for your brain to understand the light that reaches your eye.
Eyes alone don't know what they're looking at, for example, and your fingers likely wouldn't have brought you here on their own. Senses and dexterity aren't much use without a supervisor to analyze input, make decisions, and give orders. A brain needs the rest of its body to survive, so of course, you're more than one organ. But that wrinkly blob is still your CEO, not to mention the head of IT, accounting, creative services, and more. (Your brain wears a lot of hats.)
With that in mind, here are a few random facts and interesting oddities you may not know about your central nervous system. The human brain is still shrouded in mystery, but thanks to recent advances in cognitive research, we're now in a golden age of neurological enlightenment.