 So there was just short grass, grasslands, and many of these stone circle clusters are still lying in these high-lying areas that are just on grasslands, and that's how they've survived. But every year, more trees grow, and so it's becoming, you know, forestation is happening. Then you get some other areas that drop down into the lower-lying areas of southern Africa that have got a different climate, and now you've got the stone circles continue. They don't stop. They carry on there.