 Yes. Climate changes. You're somewhat intelligent. Well, climate changes. Did we have any, how many ice ages? Do you, how many, how many ice ages? How many ice ages? You're in a feisty mood today. How many ice ages have we had? A lot. Yeah, you don't know either. So, but a number of them. Just like we talked about last year. I know how many. The last one was 10,000 years ago. We can't, as people, we can't,