Ooparts!!!!
Out Of Place Artifacts...."Ooparts". Reading about some of these reported senarios of finding out of place artifacts as a kid has stuck with me and always find them facinating....
An example of Ooparts reports, and explanations debunking most of them I beleive, in the link below....
http://www.byerly.org/whatifo.htm
How many Amish does it take to screw in a light bulb????