the ancient 300 year megadrought was probably not great.

One of the big worries with climate change is that the Gulf Stream is going to get interrupted and all that lovely Caribbean water. It's not going to make Britain that warm tropical place we know it is. It's going to get even chillier, colder, worse. Uh that'll happen to the whole northern hemisphere.

In theory, the whole thing will get more chilly willy. Interestingly, this did happen relatively recently in human history. And I want to dig into some cool papers about it. What happened?

How bad was it? And how did humans respond? The archaeology, the sweet, sweet archaeology. So, this graph here, I believe, shows the surface air temperature above Greenland.

And as you can see, right in the middle of this graph, there's a bit of a dip. There's a dip of like -3 -4° at the worst. To put that in perspective, you know, when you see like some early modern paintings of of European cities and they're skating on rivers and stuff, that was during this phenomenon called the little ice age, I think, which sort of happened on and off between the 15th and 19th century. That was a cooling of 0.6°.

So minus 3° definitely a bummer. Definitely a noticeable shift in the climate. I saw this cool paper as well. The timing, duration, and magnitude at 8.2 to kilo ano event in global speliotherm records speliotherms is stallagmites and stallct tites it's another graph let's see the graph so as you can see here they've annotated it this 8.2 2 kiloano event 70% of the spiliotherms stalling stallctites showed a climate change during that time.

What did the author write? The authors of that paper state it is the most coherent signal of abrupt climate change during the last 12,000 years. And yeah, as you saw from the title, it's called the 8.2 kilo year event, kilo anoyear event. basically 8,200 years ago, a little bit before that, a little bit after that, uh the climate went rubbish for like 300 yearsish.

What caused it? Well, seemingly all those ocean currents being interrupted. So 8.2,000 years ago, there's a lot more ice on the Earth than there is today, but it had been pretty consistently melting for several thousand years. I think the last glacial maximum was 25,000 years ago.

That's when the ice was at its highest extent. And definitely ...