Those things you see in your eyes when you stare into space are called Mouches Voltanes, which are also broadly referenced to as Floaters.
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All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
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In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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Only about 2% of the world population has green eyes.
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Sheep, goats, octopuses, and toads have rectangular pupils.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Tigers can see 6 times better at night than humans.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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