Doug Riddle wrote:
> We live on land mass that can swallow the only man-made object visible > from space (a copper mine in California)... I always thought the great wall was the only man made object visible from space, but this made me look it up, and I was wrong. http://www.space.com/scienceastronomy/visible_from_space_031006.html Kind of a cool article. Michael Dolan
