Concordia is a joint French-Italian inland Antarctic research station run by the French Polar Institute and Italian Antarctic Programme. Every year it hosts a human research protocol coordinated by ESA and Concordia partners, supplied by universities and research institutions from across Europe.
As well as offering around 9 months of complete isolation, Concordia is located at around 3200 metres altitude, so the crew has to adapt to chronic hypobaric hypoxia – they live with a third less oxygen than is available at sea level.
During the Antarctic winter, the crew endures 4 months of complete darkness: the sun disappears from the beginning of May, and is not seen again until late August.