I heard a news item a few weeks ago about research by parapsychologist Paul Deveraux into the trance-inducing resonant properties of some neolithic sites. Apparently they resonate at 111Hz, about the same frequency as a low-chanting voice, inducing theta waves in those exposed to it. Apparently Vince Clark of Yazoo (and Depeche Mode) and some bloke from Heaven 17 were involved too. Problem is, I haven't seen or heard anything of this story ever since, including a couple of attempted googles. Am I making this up? It was on on BBC Radio 4, which is usually pretty reliable.