Word: diy
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Dates: during 1960-1969
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...ephemeral clue to the existence of Martian life had proved to be false. What he had read as the characteristic "signatures" of methane and ammonia in spectrographic information gathered near the Martian south pole, he admitted, were actually produced by a thick layer of frozen carbon dioxide, otherwise called diy ice. How did the embarrassing error occur? Only when he checked out the experiment in his laboratory, Pimental explained, did he learn that a thick layer of dry ice could produce spectral characteristics similar to those of methane and ammonia...