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Short bursts of Martian methane have been discovered by NASA’s Curiosity rover, in a find that goes against previous reports stating that were was none. This change suggests that something must be sporadically creating the gas, but right now, no one’s really sure what. What we do know is that 90 percent of the methane molecules here on Earth are produced by something that is, or once was, living, either of which would be a pretty mind-blowing possibility for Mars. But before we get too excited, we’re far from any kind of discovery like that at this stage. "They're very exciting measurements,” one of the team behind the find, Christopher Webster from NASA's Jet Propulsion Laboratory in the US. "They've completely opened up the debate again on Mars methane.”
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