How is this possible?
July 3, 2007 12:33pm CST
A truck leaving New York for West Virginia weighs exactly two tons. About halfway through the trip, it crosses a bridge with a maximum capacity of two tons - any more weight on it and it'll instantly collapse. Just before it crosses, a two-pound tree limb falls on the roof of the truck and remains there while it crosses the bridge. Yet the bridge is intact. How is this possible?