An Earth scientist in Wales has offered an intriguing new theory on the origin of the iconic bluestones which were used to build Stonehenge. Dr. Brian John says that the long-held belief that the exotic-for-the-area and massive stones were transported to the site by ancient humans is nothing more than a myth. On the contrary, he posits that there is a much simpler explanation for how the rocks arrived at the site: they were carried there by glaciers.
John bases this conclusion on an examination of the specific stones found at the site as well as a lack of evidence for quarries from the time that Stonehenge was built at Preseli Hills, which is where legend states that the bluestones had been procured by the builders of the monument. As such, he believes that the idea that humans had engineered elaborate methods to transport the two-to-four-ton rocks is more of a fantasy rather than a realistic way for the pieces to have arrived at the Stonehenge site.
More on this thought-provoking story at the Coast to Coast AM website.