In 2177, human error led to a gravitational density overflow on the moon which caused a shift in the lunar rotational axis. Consequently, the lunar polar regions, previously having endured near-perennial sunshine, only saw approximately ten seconds of near-darkness every deci-cycle. The most significant effect that perennial sunshine has on these regions is an increase in solar radiation.
As a result, these areas are constantly observed and their solar radiation levels tested by both manned and automated environmental sensor outposts. Manned E.S.O.’s are self-sustaining single-person habitats lowered several feet into the ground and covered by a reflective fly.
While well-protected from solar radiation, humans in these regions do endure some side effects as a result of the perennial sunshine, including a hardening of the epidermal layer, a loss of REM sleep, a degradation of motor skills and the frequent but inappropriate use of the word “dude” in conversation.