paul
Moderator
From https://www.bbc.co.uk/news/world-europe-56875801
A group of French volunteers have emerged from a cave after a 40-day study exploring the limits of human adaptability to isolation.
The 15 participants lived in the Lombrives cave in south-west France with no phones, clocks or sunlight.
They slept in tents, made their own electricity, and had no contact with the outside world.
The project aimed to test how people respond to losing their sense of time and space.