Rowan Jacobsen

Like left side is just sloping off, basically.

Yeah, now, so that photo and that study got used to, like, scare the shit out of a lot of people, try to keep them out of the sun.

Yeah, and so there's a couple of interesting things there.

One, that is shocking, but...

The question to ask is, why doesn't every trucker look like that, right?

If that's the problem, why him?

Because I've been driving in a car for 45 years, and my face is...

Kind of hanging in there.

But the other thing is window glass, I think, is actually a really interesting problem to talk about.

Because window glass blocks UVB, but not UVA.

And there's two different wavelengths of UV.

The UVB is the super high energy one.

UVA is a little bit lower.

It's kind of on the way to blue.

Okay.

And they used to think back in the day that UVB was the only one that caused skin cancer.

And those old sunscreens that we used in the 70s, 80s only blocked UVB.

Window glass blocks UVB, blocks only part of the UVA.

So anytime you're driving or you're hanging out in a window in your house, you're getting a bunch of UVA.

You're not going to burn because UVB is the one that causes burning.