The stars and flashes of light you see when you rub your eyes are called "phosphenes."
Tic Tac mints are named after the sound their container makes.
People don’t sneeze in their sleep due to their brain shutting down the reflex.
It costs the U.S. Mint almost twice as much to mint each penny and nickel as the coins are actually worth. Taxpayers lost over $100 million in 2013 just through the coins being made.