Unlike Terrans the Athsheans follow a polycyclic sleep pattern .
Athsheans ' circadian rhythms Athsheans them most active at dawn and dusk ; thus Athsheans they struggle to adapt to the 8 - hour Terran working day .
Unlike Terrans the Athsheans follow a polycyclic sleep pattern , and their circadian rhythms make them most active at dawn and dusk ; thus , they struggle to adapt to the 8 - hour Terran working day .