This is amazing!http://www.independent.co.uk/news/uk/home-news/stonehenge-builders-had-geometry-skills-to-rival-pythagoras-834313.html Abusive comment hidden. (Show it anyway.)
http://www.independent.co.uk/news/uk/home-news/stonehenge-builders-had-geometry-skills-to-rival-pythagoras-834313.html