Dr. Genevieve von Petzinger

And so that's 150,000 years worth of archaeology sitting at the front of the cave and in all these beautiful little layers.

So there's a very long history of people of all sorts living there.

And what you find then is that there are these smaller entrances

at the back of what would have been kind of like the main chamber there would have been a couple of smaller passageways that then took you into again this cave that just opens up into this huge like they're huge like the big chamber when you first go through the little passage and then you come out the other side is enormous like it's like you know the lord of the rings when you go into like the dwarf hall like it's huge like it's a really big

So you walk into there and you go, now there's stairs, which we appreciate.

Makes it less slippy and dangerous, but you can go down the stairs.

There's art in all the, not so much in the main area.

There's a little bit in the main area, but most of it is in offshoots and inside chambers.

or in really lovely panels.

And one of the things that makes El Castillo so amazing is that there's panels, like lots of... So a panel is what we're talking about when we're talking about a piece of the wall, which seems to be sort of bounded, like we're in a chamber, there's one big, nice, shiny, whitish wall, because it's that limestone, right?

And

There's a bunch of them where it's like there is three or four different groups of people left marks on the same wall.

These walls are complicated.

And so there's one in particular, which is where the very first time old dates came out, I think it was like 2012, was the 40,000-year-old.

They did the first dates.

And so for this, they're using what's called uranium series dating, which again, cracked open everything.

Because before that, we only had carbon dating, which requires...

charcoal or organic material, and it's only good back to about 40,000-ish or so.

Yes.

So again, it's quite limited, right?