French isolation study ends after 40 days in cave hideout | News News

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Fifteen people who took part in a scientific experiment emerged on Saturday from their self-segregation in the Pyrenees.

Ever wonder what it would feel like to unplug from a hyperconnected world and hide away in a cave for a few weeks? Fifteen people in France found out.

After 40 days in voluntary isolation in a dark, damp and vast cave, eight men and seven women who took part in a scientific experiment emerged on Saturday from their self-segregation in the Pyrenees.

With big smiles on their pale faces, the 15 participants exited the Lombrives cave to a round of applause and basked in the light of day while wearing special glasses to protect their eyes after so long in the dark.

“It’s really warm!” said one.

For 40 days and 40 nights, the group lived in and explored the cave without a sense of time. There were no clocks and no sunlight inside, where the temperature was 10 degrees Celsius (50F) and the relative humidity stood at 100 percent.

The cave dwellers had no contact with the outside world, no updates on the pandemic, or any communication with friends and family above ground.

Scientists at the Human Adaption Institute leading the 1.2 million euros ($1.5m) “Deep Time” project say the experiment will help them better understand how people adapt to drastic changes in living conditions and environments, something much of the world can relate to because of coronavirus pandemic.

Members of the French team that participated in the study pose for a photo [Renata Brito/AP Photo]

‘Really interesting’

In partnership with labs in France and Switzerland, scientists monitored the 15-member group’s sleep patterns, social interactions and behavioural reactions via sensors. One of the sensors was a tiny thermometer inside a capsule that participants swallowed like a pill. The capsules measure body temperature and transmit data to a portable computer until they are expelled naturally.

The team members followed their biological clocks to know when to wake up, go to sleep and eat. They counted their days not in hours but in sleep cycles.

On Friday, scientists monitoring the participants entered the cave for the first time since the experiment started. They said many of the people in the research group miscalculated how long they had been in the cave and thought they had another week to 10 days to go.

“It’s really interesting to observe how this group synchronises themselves,” project director Christian Clot said in a recording done from inside the cave.

Working together on projects and organising tasks without being able to set a time to meet was especially challenging, he said.

Although the participants looked visibly tired, two-thirds of them expressed a desire to remain underground a bit longer in order to finish group projects started during the expedition, said Benoit Mauvieux, a chronobiologist involved in the research.



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