Sleep calculator

Scientists have discovered how an animal's biological clock wakes it up in the morning and puts it to sleep at night. Brain circadian neurons that govern the daily sleep-wake cycle's timing. High sodium channel activity in these neurons during the day turn the cells on and ultimately awaken an animal, and high potassium channel activity at night turn them off, allowing the animal to sleep.

Ref: Matthieu Flourakis et al., 2015, Cell.