The cavenauts prepare for the six nights they will spend exploring the caves <br />of Sa Grutta in Sardinia, Italy. After a week of training, the moment has <br />arrived for them to say goodbye to the Sun and set up camp underground. <br /> <br />An international crew of six astronauts are training for a caving adventure <br />designed to prepare them for spaceflight. Training started a week before they <br />entered the caves on Friday 7 September to spend six days underground.
