Antikythera+Mechanism

http://www.economist.com/node/1337165 https://www.youtube.com/watch?v=UpLcnAIpVRA http://www.redicecreations.com/article.php?id=16907 https://www.youtube.com/watch?v=y_SYdqPB40Q 43 minutes

http://www.ipe.cuhk.edu.hk/Website%20v2/Website/Moon%20Phase%20Mechanism.html

http://en.wikipedia.org/wiki/Saros_%28astronomy%29

http://www.nature.com/news/2010/101124/pdf/468496a.pdf