|Julian Spaulding [MailOnline via "Stonehenge News and Information" blog]|
Julian Spaulding has a theory that Stonehenge was decked at some point. I'm not sure if whether this was true or not, but it does seem reasonable to suggest that the stone structure is a skeleton of a heavy organic structure. The fact that the sarsen stones are flat seems rather convenient. On the other hand, if the structure was covered it would seem to take away from the view of the sky, so it seems less likely.