Why would evolution have enabled blind mole rats to synchronize their suprac

Why would evolution have enabled blind mole rats to synchronize their suprachiasmatic nucleus (SCN) activity to light, even though they cannot see well enough to make use of the light?
Describe the stages of sleep. During which part of a night’s sleep is REM most common?
Unlike adults, infants alternate between short waking periods and short naps. What can we infer about their neurotransmitters?
According to the neurocognitive hypothesis, why do we have visual imagery?