----------------------------Original message---------------------------- I had a question the other day that I think was answered correctly but am not really sure. I'm sure it's a common question but I've never been asked this one. If one could drill directly down from Philadelphia to the other side of the earth, where would one emerge? She wanted to be as exact as possible. Any thoughts on location and what is the best method to figure the answer? It's probably pretty simple. Thanks. Rich Boardman Map Collection Free Library of Philadelphia [log in to unmask]