From April 27 through May 1, a five day Mars field test will take place at the caves. The simulation will provide scientists and engineers from 3 different continents with the opportunity to carry out selected geophysical and biomedical experiments, most of them related to the human exploration of Mars.
Learn more from the European Space Agency.



Just don't eat a bunch of gassy creating foods like beans before you suite up ....
Good observation. Actually, the food they are given are designed to address that concern. In addition, as far as I know, their still is no deodorant allowed on space missions, or in subs, because of the CO2 scrubbers will get fouled up. But I would hope to be corrected on that.
"Dave, how come you are walking in an ice cave, Dave?" "I thought I was your friend Dave." "Why aren't you listening to your old friend Hal, Dave?" Dave says, "Hal, shut up and let's go bowling!"