Скачать или смотреть The Cave Experiment That Broke the Human Body Clock – Part Two

In Part One, we explored the strange 1962 cave experiment by French geologist Michel Siffre.

He lived alone underground for months without sunlight, clocks, or any sense of time — and when he emerged, his internal clock had drifted nearly a month away from reality.

But the story didn’t end there.

Ten years later, Siffre conducted a second, even longer isolation experiment in a Texas cave that lasted more than six months.

This time, scientists discovered something even stranger.

His biological systems began operating on completely different rhythms.

His sleep cycle followed one clock.
His body temperature followed another.

The human body wasn’t running on a single internal clock at all.

It was running on many.

This groundbreaking research helped scientists better understand circadian rhythms, sleep disorders, jet lag, and how humans adapt to extreme environments — including the possibility of long-duration space travel.

Tonight’s Campfire Conversation explores the bizarre second chapter of the cave experiment that changed how scientists understand time inside the human body.