"Man Out of Time": A man spent two months in a cave and made an astonishing discovery.

An individual’s experiment on his own life so profoundly impacted the scientific community that even NASA utilized his findings. The French scientist Michel Siffre, who passed away this year at the age of 85, conducted a unique study on the perception of time that forever altered our understanding of human biological rhythms. This case is reported by Lad Bible.

In 1962, inspired by the space race, 23-year-old Siffre descended 130 meters underground in the mountains of Scarasson to conduct an experiment that would shock even the boldest scientists. He abandoned clocks, calendars, and sunlight, isolating himself in a cold and damp cave for two months.

Alone in complete darkness, Siffre slept, ate, and performed research solely based on the internal sensations of his body. His goal was to understand how the absence of external signals affects human biological rhythms.

The Frenchman discovered that the human body possesses its own internal "clocks" that operate independently of the usual 24-hour cycle. Without external cues, people shift to a 48-hour rhythm. The "man out of time" also noted that his perception of time significantly slowed down: five minutes of real time felt like two.

This discovery laid the groundwork for a new scientific field—chronobiology. The results of his experiments were later used by NASA to enhance astronaut training, addressing time disorientation in space conditions.

Ten years later, Siffre repeated the experiment, but under more extreme conditions. He spent six months in a cave in Texas. This allowed him to deepen his research and confirm that isolation from time radically alters biological rhythms.

The publication notes that Siffre's work demonstrated the complexity and wonder of our body's mechanisms. His discoveries opened new horizons for science and provided us with a better understanding of how time, even when it seems abstract, influences our existence.

It was also revealed that the man visited a town where people "live" underground with all amenities. Blogger Ben Morris not only explored the lives of the locals but also lived in an underground apartment he rented through Airbnb.