Having once lived near Stonehenge whilst stationed in Bulford as a young soldier, this story makes me a bit home sick now I live so far away.

The Druids are thought to have built Stonehenge and it has a directional relationship to the sun, moon and heavenly bodies. The fact that as yet no bodies have been dug up from nearby to suggest  was a sacrificial site, seemily leads to the idea of a healing place. 

The actual samples from the dig will I am sure give evidence to the sites real use, the dig is of course a good idea