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Researchers have found trace volcanic gases on Mars, including hydrogen chloride seeping out through volcanic rifts. Professor Daniel Mège described the discovery as like looking for a needle in a haystack. Good News Network reported that the finding could serve as a smoking gun suggesting Mars is volcanically active, a key factor in the search for life. The gas emissions are considered a potentially important clue in the search for life on the Red Planet. The finding has not been presented as proof of life.