Hoover Dam Jul 14, 2002 23:05:53 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Bennett D. Ebberly on Jul 14, 2002 23:05:53 GMT -5 Check out this Scientific American article:www.sciam.com/article.cfm?articleID=000F39B8-B1E4-1D07-8E49809EC588EEDF&catID=2