 to look at aerial photographs, at Google photographs and Google shots, and then I started to count them and really try and be as scientific as I could. And when I started to add it all up, I nearly fell off my chair. Literally, I'll never forget that moment. In fact, I was sitting in the same chair that I'm talking to you from right now when that happened, when I started to add up those stone circle numbers, and it came to more than 10 million, more than 10 million stone circles.