A guy named William Addis invented what you know as a toothbrush.
In June of 1780, the first mass produced toothbrush was rolled out…
in a small town called Clerkenwell, England.
If you ever visit the town, the first thing you may notice? 
No plaque!
That’s good, right?
You brush your teeth this morning? Right?

You still curious?
He actually invented what looks like a toothbrush 10 years earlier…
while in prison.
Prison may be just one word. But to many, it’s a whole sentence.