Some animals can sleep with just half their brain at a time. So jealous.
There's a part of your brain that regulates your circadian rhythms with the help of light.
It’s a bit like a master clock for your body, and it's called the "suprachiasmatic nucleus". It lives just above part of your brain called the optic chiasma and receives input from your eyes about the amount of light in the outside world.
Blind people often have trouble with sleep because daylight is so important to regulating circadian rhythms.
About half of all blind people who have no light perception at all suffer from non-24-hour sleep-wake disorder, where their internal clock doesn't match up with the day and night cycle.
We tend to sleep a few minutes less per night around a full moon.
A study published this year showed that humans get less sleep, and less deep sleep, around the full moon, even if they sleep in a windowless room.
en.wikipedia.org / Gregory H. Revera
You burn more calories watching TV than you do sleeping.
But that is not an excuse to stay up and watch another episode of Breaking Bad.
