Everyone remembers visits from the Tooth Fairy! August 22 is National Tooth Fairy Day, so we are celebrating with five facts about the mysterious lady. 

1. She's not very old

Compared to Santa Claus who dates back to ancient history, the Tooth Fairy only dates back to the early 1900s. She was first mentioned in an article in the Chicago Daily Tribune's "Household Hints" column on September 27th, 1908. A reader suggested that "many a refractory child will allow a loose tooth to be removed if he knows about the tooth fairy. If he takes his little tooth and puts it under the pillow when he goes to bed the tooth fairy will come in the night and take it away, and in its place will leave some little gift."

2. The price of a tooth fluctuates with the stock market

Insurance company Delta Dental has tracked the price of a tooth for a while now. They found out that the price of a tooth correlates with the S&P 500.