IN JULY 1962, Michel Siffre took off his watch and descended into the abyss of Scarasson in the French Alps. There, in a cave 130 metres below the surface, he set up camp next to a glacier. With a torch as his only light source, and deprived of all reminders of the passage of time, he lived underground, alone, for 63 days…
This article first appeared in New Scientist on 8 August 2018. To continue reading, click here (paywall).
This article first appeared in New Scientist on 8 August 2018. To continue reading, click here.