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Most of the
said they enjoyed the
of total isolation. Two-thirds expressed a
to remain underground a while longer in order to finish projects they had started. Deep Time's director Christian Clot said the experience would, "test humans'
to adapt to the loss of their frame of
for time and space". He said: "Our future as humans on this
will evolve. We must learn to better understand how our brains are capable of finding new solutions, whatever the
." One striking
is that participants lost their
of time. Mr Clot said: "In our heads, we had walked into the cave 30 days ago". One team
estimated the time underground to be 23 days.