AlexanderThomSee also which opens: Alexander "Sandy" Thom (26 March 1894 – 7 November 1985) was a Scottish engineer most famous for his theory of the Megalithic yard, categorization of stone circles and his studies of Stonehenge and other archaeological sites." Robin Heath recently wrote a book describing Thom's major contribution to the notion of a megalithic science:  . Alexander Thom: Cracking the Stone Age Code. Bluestone Press (May 2003). ISBN978-0-9526151-4-9.


Alexander Thom undertook a pioneering survey of British stone circles between 1934 and his death in 1985 and this in itself has created a unique archive of site plans without which the megalithic heritage of britain would never have been properly recorded as a whole, by British archaeologists. However, his ideas about the megalithic, emerging from this work, have generated controversy not least because he felt that the megalithic monuments showed clear evidence of a megalithic science.

His main ideas were quite revolutionary concerning the megalithic science, and these can be stated as,

  1. That alignments exist to known astronomical events on the horizon, between points of observation, intermediate features and distant horizon features, these features being distinct through having been created as megaliths or, whilst natural, yet apparently chosen as part of an alignment. 
  2. That the megalithic monuments often contain an implicit architectural unit of length used in their construction, especially within the stone circle geometries.
  3. That british stone circles can be seen to involve simple circles as well as ellipses, flattened circles, enlarged circles (eggs), double circles, which seems to have been achieved geometrically using methods distributed over a large area of Britain.

His work triggered various responses from the scientific establishment, initially positive as well as negative. Events have conspired to create a confused mixture of individual responses which by being referenced add up to a rejection of Thom's work. The subject now only belongs to the history of science because it shows how science is defined by a scientific establishment whose opinions and preferences define what they consider to be scientific. This aspect of systems was proved mathematically by Kurt Godel "one of the most significant logicians in history". His Incompleteness Theorum showed: 

  1. If the system is consistent, it cannot be complete.
  2. The consistency of the axioms cannot be proven within the system.


One doubts that science, as practiced, is consistent despite the fact the system of science is considered consistent by scientists. It is left to historians of science to know otherwise, once the nay sayers and proponents are dead..