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17:27paintings, right? Because the cave paintings formed and then the and then this mineral deposit formed. So, we can date the mineral deposit and using radiocarbon and other kinds of radioactive dating, we can say that this stuff was at least 60,000 67,000 years old. Right. >> Right. And this puts it as older than the cave paintings in um what's it called? Lascals. >> Yeah. >> Lascals, [laughter] France, which we we mentioned in the previous Yes. >> episode. again. I'm pretty sure that's how it's pronounced. >> In the previous episode, [laughter] we did uh an ancient math story uh uh from from Mesopotamia.
18:08>> Yeah. And we were talking about art in the ancient >> past in ancient past. And uh >> Las came up. [laughter] That's all I'm saying. Okay. So, jokes aside though, one of the one of the coolest things that I found about this story was that in the same cave, they also had recent paintings from about 3,000 to 4,000 years ago. Ah, >> which I find kind of incredible. Like imagine, you know, you're going back to a cave as human beings. You're going back to a cave that has been this repository of art for 60,000 years. >> Isn't that kind of cool? It's >> to be those human beings to be like I go back and like those handprints were 60,000 years ago.
18:49>> Yeah. Yeah. >> I don't know. I think I think that's that's that's really cool. >> The human story is so beautiful. >> Yeah, it really is. I like that. Our story number two is about climate change and this concept of elevation dependent climate change in mountain environments. This is coming out of the University of Portsmouth in the UK, Montana Technological University, a Montana State University and the Institute of Atmospheric Sciences and Climate National Research Council in Torino, Italy, published in Nature, Earth, and Environment. The summary here is that mountain regions
19:31show rapid environmental change under anthropogenic warming. The rates of these changes are often stratified by elevation leading to elevation dependent climate change or EDCC. Yeah. And this is something that I've noticed. I go to the Himalayas almost every year, maybe every other year, and you can literally kind of see the snow line decreasing. Okay. >> They analyzed data from 1980 to 2020, and they found that the mountains are actually warming 0.2 2° C faster >> than the land plains >> and snowfall is increasingly being replaced by rain. I mean, anecdotally,
20:13you saw this when you went to Big Bear right outside Los Angeles. >> Literally just experienced this, which is like it's January. Um, and normally there's plenty of snow on the ground and it was I'd never se I'd never seen the ground. >> Yeah. Yeah. And for context, there was a lot of precipitation in Southern California. Now, obviously this is anecdotal and we don't want to conflate weather versus climate. But if you look at the gradual trend, this is what they're arguing, correct? From 1980 to 2020, >> snowfall is being replaced by rain. Okay? And that means more flooding.