Hey Tom A,
Thought you might like to check out this article about ancient
stone drills.
Boy am I glad to be living in the 21st century with a nice comfy
chair to sit in while the dentist tells stories...
Katie
Yeeowww! Prehistoric Dentists Used Stone Drills
http://www.livescience.com/history/060405_neolithic_dentist.html
or
http://tinyurl.com/cbcw9o