http://www.ted.com/talks/tom_wujec_demos_the_13th_century_astrolabe.html
The worst TED I have watched out of at least a hundred. Apparently he has no idea about the Antikytheria device? Also, he might as well have been a paid iphone shill and the weird anti-tech/progress philosophy he seems to have really ruined a possibly good presentation.
ineffable correspondence 