I know everyone's probably seen this wonderful old documentary Cracking The Stoneage Code but this thread prompted me to put it up anyway

http://www.bbc.co.uk/archive/chronicle/8604.shtml

Stone circles are works of engineering but woe betide an actual engineer daring to study them.

Chap in dickybow: "You've got to be an archaeologist before you can start putting forward new ideas about archaeology"