Go ahead. Say something good that happened to you today.

Now knock on wood.

But wait — why did you just do that? Why does tapping your knuckles on a table have anything to do with keeping bad luck away? Who started this? And why are we all still doing it?

In this episode, Daniel asks one of those questions that turns out to have no clean answer — and that's exactly what makes it so interesting.

Here's the thing. Most people assume knocking on wood is some ancient ritual with a clear origin story. A definitive moment in history where someone decided wood meant protection. But when you actually go looking for that moment — it isn't there.

Nobody knows for sure where this came from.

Not even historians.

But there are three theories. And one of them involves a  ...