twilight zone

Overall, the team found that just spending one minute in N1 sleep, the twilight zone, triggered a person to find a hidden rule nearly three times more often than those who were awake but resting.

Super-LumiNova hands are readable in the sea’s twilight zone.

The animals in this twilight zone share many characteristics, but among the most important is slow growth, leading to extended adolescence, low fecundity once maturity is attained, and long lifespans.