Thomas Edison's last breath was saved in a test tube.

The "last breath" of the inventor Thomas Edison can be seen on display in the Henry Ford Museum. According to legend, Thomas Edison's son, Charles, approached his father on his death bed and placed a test tube over his father's mouth as he breathed his last breath. He then sealed the test tube with a cork and sent it to Henry Ford, a good friend of his father. Ford kept the test tube, believing it to contain his friend's soul.

If this seems too good to be true, that's because it is. However, it was years before anyone found out what the mysterious test tube actually was.