you've got to think of stonehenge acknowledge landscape in the context of something like westminster abbey or temple of the god in egypt, places that were sacred for hundreds of years and changed and modified. the way you've got to think about this landscape is small numbers of farmers lived there and occasionally much larger numbers of people came to celebrate rituals and the landscape changed over many, many centuries to accommodate changing beliefs. >> talking about rituals, the timber building that's quite large is believe to have been the site of bizarre burial rituals. how do we know that that is what was going on there? >> they are making an informed guess at this point. what they will now do, they located the timbers, they will now excavate it in the next few years, i would imagine. it looks very like other buildings elsewhere, large timber structures standing by themselves. what would happen is that you would die and the people believed you were going to become an ancestor. they would expose your body in the channel house, let the bones be exposed and the flesh decompose, then gat