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Mars’ subsurface is ‘burping’ out methane and scientists aren’t sure why
Reported by Stefanie Waldek
Since 2012, NASA’s Curiosity rover has repeatedly detected methane on Mars, specifically near its landing site inside the 154-kilometre (96-mile) wide Gale crater. But that Mars methane is behaving erratically. It only appears at night, it fluctuates seasonally and it spikes unexpectedly to levels 40 times higher than usual. To make things more puzzling, the gas isn’t present in appreciable amounts high in the Martian atmosphere, and it hasn’t been detected near the surface in other Red Planet locales. So what’s going on at Gale crater?