Mysterious West has made it on to DVD with the release of Prehistoric Geometry in Britain by the ground-breaking Devon researcher Tom Brooks, who has just launched a website to promote his work.

The first part of the DVD features the podcast interview I made with Tom last year for the Mysterious West webpages on the Western Daily Press website – now accompanied by striking visuals – and the second part, images of historic sites and 12 geometric charts.

This really is a DVD of discovery, for Tom's work will change forever your view of our ancient ancestors, and the nature and purpose of their camps, barrows and stone circles.

It proves that our Stone Age forebears of 4,000-6,000 years ago were not merely members of primitive, warring tribes but a people of great sophistication and ingenuity.

"I hope to get some recognition for my work, not just personally, but for the geometry I have discovered which indicates we had an intelligence here 5,000 years ago which is way beyond expectation," said Tom, who lives near Honiton.

I've been championing Tom's findings because I believe them to be of epoch-making importance.

His lifelong research, based upon the true position of each ancient site relative to all others according to the Ordnance Survey National Grid, reveals that all are related geometrically in a network of isosceles triangles – those that have two sides of equal length – and are aligned with remarkable accuracy over great distances. A vast network across Southern England and Wales is focused on Silbury Hill, Wiltshire, and, indeed, seems to have been directed from there, explaining at long last the purpose of the largest man-made mound in Europe.

One of the major implications is that the perceived sacredness of these ancient sites does not necessarily arise from any inherent qualities, but from this geometry, the principles of which are generally thought not to have been recognised until the Greeks at least 2.000 years later.

The DVD, together with a CD-ROM of back-up statistics, are available from Tom's website www.prehistoric-geometry.co.uk at £17.50, including postage and packing.