The eye muscles are the fastest in the body, contracting in less than 1/100th of a second.
We blink about 15-20 times per minute, adding up to over 28,000 times a day.
Your iris is as unique as your fingerprint, with no two being exactly alike.
Your brain flips the upside-down images your eyes send so you see things right-side-up.
The human eye can detect around 10 million colors and is most sensitive to green.