This is an I-Heart podcast.

Welcome to Stuff You Missed in History Class, a production of IHeart Radio.

Hello and welcome to the podcast. I'm Holly Fry.

And I'm Tracy V. Wilson.

This episode is brought to you by Everything is depressing and I'm curious. I also have a forthcoming episode that has similar

motivations. Yeah, I don't know what day it is, what day it was.

I have been traveling a lot for work, and there was one day, you know, my husband and I had been apart for like over a week, which is very unusual for us.

I don't know that it's ever happened before, save one exception, because he was traveling and I was traveling.

Some of that was surprises. But we got home and I was like,

hey, let's go out for lunch because I flew in early in the morning, early meaning in the morning period.

And we did. And we were at this place that we love near our house that is near train tracks.

And as trains were going by, I in my somewhat exhausted state kept gazing at them. And I was looking at all

the graffiti. And I had this moment of like, I wonder what train people of the 1800s would think of

trains today. And then I went, they didn't even have spray paint. And then I went, when did that

happen? So here we are.

I love when that kind of train of thought leads to an episode.

Yeah. To be clear, I don't want to disappoint anyone because I know it is a much beloved subject for some people.

We're not talking about graffiti art, even though I think that is fascinating.

It'll get a little chatter on our Friday episode because I stumbled into a hotbed of people discussing it. But the invention of spray paint, like a lot of inventions, is kind of a matter

of debate. But this isn't just a case that we've had in some instances

where a bunch of different inventors are onto the same idea,

kind of around the same time,

...