NASA’s Curiosity rover discovers that methane on Mars changes with the seasons

NASA’s Curiosity rover has detected background levels of methane in the atmosphere of Mars, and these concentrations seem to go up in the summer and down in the winter, according to new research. Where the methane is coming from is still a mystery, but scientists have some ideas, including that microbes may be the source of the gas.Researchers at NASA and other US universities analyzed five years’ worth of methane measurements Curiosity took at Gale Crater, where the rover landed in