It is almost impossible to sneeze with your eyes open. It is a defense mechanism that has evolved to protect our eyes from bacteria and debris.
Red Blood Cells circulation time
It takes about 20 seconds for a red blood cell to circle the whole body.
More Health Facts
Can't sneeze with open eye
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
Your tongue is the only muscle in your body that is attached at only one end.