Bacteria on your skin cause your itches. Specifically, bacteria known as Staphylococcus aureus can release a chemical that activates a protein in our nerves. This sends a signal from our skin to our brains, which our brain perceives as an itch.
100 Mind-Blowing Perceives Facts
Iguanas have three eyes. Two normal eyes and a third eye on top of their head that only perceives brightness.