The group, led by French-Swiss explorer Christian Clot appeared at around 10:30 am (0830 GMT) from the Lombrives cave in Ariege. “It was like pressing pause,” said Marina Lançon, one of seven women to take part in the experiment. In partnership with laboratories in France and Switzerland, scientists at the Human Adaption Institue, monitored the 15 team members’ sleep patterns, social interactions and behavioural reactions via sensors.