Copper Wire After having dug to a depth of 10 feet last year, French scientists found traces of copper wire dating back 200 years and came to the conclusion that their ancestors already had a telephone network more than 150 years ago. Not to be outdone by the French: in the weeks that followed, American archaeologists dug to a depth of 20 feet before finding traces of copper wire. Shortly afterwards, they published an article in the New York Times saying : ""American archaeologists, having found…