This aspect of Stonehenge is the most overlooked of all and yet provides as much of a mystery as how the stones were erected in the first place. Though it might be argued, and generally accepted, that Man is responsible for removal of the stones we need only look to restoration of the site during the 20th century to realize how difficult the Sarsen stones are to excavate and transport. The largest cranes available were brought in to lift stones which are impossible to cut for removal in smaller chunks. Surface erosion has played its part in weakening the foundations which, combined with the only other force acting on the site, the wind, no doubt caused some stones to overbalance and fall.

But the pattern of destruction suggests a single force far greater than the wind could ever produce, something more in keeping with a tidal wave or earthquake. The Stonehenge Observatory suggests an even bigger event than either of these, the consequences of which changed the course of history - and the signs are that it may be about to happen again. Read more ...