The romantic theory that Mars is inhabited by an intelligent race was easier to believe before the development of radio. Intelligent Martians would surely discover radio. They would hear at least some of the radio chatter on earth, and earthlings would hear some of theirs. The fact that the earth cannot listen to Martian radio programs is contributing evidence that ancient, intelligent Martians do not exist.
Radio signals of a sort, however, do come from Mars. Last week the Naval Research Laboratory announced that Cornell H. Mayer, Timothy P. McCullough and Russell M. Sloanaker...
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