♪ The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
♪ It takes about 20 seconds for a red blood cell to circle the whole body.
♪ Your body is creating and killing 15 million red blood cells per second!
♪ George Washington was deathly afraid of being buried alive. After he died, he wanted to be laid out for three days just to make sure he was dead.
♪ Because metal was scarce, the Oscars given out during World War II were made of wood.
♪ During their periods womens middle fingers shrink. No one knows why.
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