French isolation study ends after 40 days in cave hideout


Ever wonder what it would feel like to disconnect from the world and hide away in a cave for a few weeks?
Well, 15 people in France have found out.
A group of French scientists and explorers has emerged from a cave after spending 40 days inside.
They were in deep isolation without any sense of time.
Why did they do it?
Al Jazeera’s Andrew Chappelle explains.
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