Hey, you welcome to Stuff to Blow Your Mind. My name is Robert Lamb.

And I'm Joe McCormick and today it's Saturday, so we're bringing you an episode from the

Vault. This is the invention of the lock and key, which originally published January

12th, 2021. Is there anything to say about this one, Rob?

Just that it's a good episode. I remember this one being a lot of fun talking about ancient

lock and key technology, but in doing so, like you're breaking down exactly what is a lock,

what is it supposed to do, and what are the basic principles of its functionality?

I think I recall something about early keys looking like a big bathing device or back scratcher

that a hippopotamus would use in a cartoon.

Yep.

Okay.

Welcome to Stuff to Blow Your Mind, a production of I Heart Radio.

Hey, welcome to Stuff to Blow Your Mind. My name is Robert Lamb.

And I'm Joe McCormick. And today we're going to be doing one of our invention episodes.

We're going to be talking about locks and keys. I've got a question at the beginning

here. Did you, Rob, ever play with a combination lock or any kind of lock sort of in a fidgety,

almost fidget spinner kind of way when you were a kid? Because I definitely did. I had one

that I would just lock and unlock over and over again.

Yeah, I remember that I feel like any house is going to have a drawer. And in that drawer,

well, A, you're going to have a bunch of keys that you have no idea where they go. They've

completely lost their locks. But then you may well also have a spare key lock, a spare

combination lock. And those are instantly fascinating because, yeah, you're getting

...