15 Study Participants Were Finally Released After Living in a Cave With No Sunlight or Clocks for 40 Days

Fifteen people emerged from a cave in southwestern France on Saturday after voluntarily participating in an experiment meant to test the limits of human isolation.The scientific experiment, titled the Deep Time project, lasted 40 days and 40 nights and was conducted in the Lombrives cave completely underground. The goal of the study, led by scientists at the Human Adaption Institute, was to observe how the absence of clocks, daylight and communication with the outside world would affect the part...