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Evanston, Ill. (UPI) May 5, 2013

That man on the street corner sporting the tin hat and claiming to have conversed with aliens may not be crazy after all; he could have just been demonstrating the sun-absorbing qualities of tinplate, the silvery-white metal element of atomic number 50. Tinplate, or tin - as researchers from Northwestern University recently proved - is cheaper than lead and just as good at absorbing s