Michel Siffre: 200 Days in Darkness | When Time Broke Down

LOS ANGELES - Nov. 16, 2025 - PRLog -- The documentary follows French speleologist and chronobiology pioneer Michel Siffre, who in 1972 isolated himself deep inside a cave with no sunlight, no clocks, and no external cues. His mission was to understand how the human mind perceives time when removed from the natural rhythms of day and night. What he discovered would redefine the fields of sleep science, psychology, and human endurance.

Over the course of 200 days, Siffre's internal clock drifted so dramatically that he lost nearly all sense of reality. The documentary highlights the emotional and psychological challenges he faced in total darkness, while also explaining how his observations helped scientists better understand circadian rhythms, sensory deprivation, and the impact of extreme isolation on mental health.

Through a blend of research, archival references, and narrative storytelling, Echo Trace presents Siffre's journey as both a scientific milestone and an emotional exploration of what happens when the mind confronts true solitude. The film aims to give viewers a deeper look into how isolation reshapes memory, perception, and the passage of time itself.

The full documentary is available on YouTube: https://youtu.be/HKHV9b4Jc9w