That’s just one of many fun facts about the human body you never learned in school. A cool thing called “total internal reflection” happens when you point a laser beam at a jet of flowing water.

10. The strongest muscle in the human body, relative to its size, is the masseter muscle in the jaw. Related Post: 52 Weird ...

Why should we appreciate our nervous system? Read these 11 fun facts and you’ll know why: 1. The body has billions of nerve cells Every person’s body contains billions of nerve cells (neurons).