When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
Tigers can see 6 times better at night than humans.
Our eyes are always the same size from birth, but our nose and ears never stop growing.
The human eye blinks an average of 4,200,000 times a year.
Poor eyesight (myopia) is associated with higher IQ.
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.