#ExoMars @ESA_TGO primary goal is to take detailed inventory of trace gases – those that make up <1% of the total volume of the planet’s atmosphere – in particular looking for methane & other gases that could be signatures of active biological or geological activity. pic.twitter.com/zpoVhgrDTq

— @ESA_ExoMars (@ESA_ExoMars) April 9, 2018