When Rosetta sniffed the gas around Comet 67P, it found a cloud that would have smelled of rotten eggs, ammonia and bitter almonds — and hidden in that cosmic stink were some of the chemical ingredients that may have helped life begin on Earth
Between 2014 and 2016, the European Space Agency’s Rosetta spacecraft flew alongside Comet 67P/Churyumov-Gerasimenko and analysed the gas…
