A century before the birth of Christ, a Roman named Lucretius suggested that since life evolved on earth, one might expect that there are other planets like earth where life also evolved. Modern scientists who believe in evolution also feel that if life could be found on other planets, their arguments for evolution would be stronger. They even persuaded the United States Congress to approve millions of dollars to search for radio signals that might come from other planets. The centerpiece of their effort was a radio receiver linked to a computer.

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