He sleeps at night
The longest that a human has stayed awake is just short of 11 days, so theoretically staying awake for eight days is doable. However it is not healthy and you should not attempt it.
sleep at night
sleep at night
You would certainly die without your sleep!
The recommended amount of sleep for the average adult is eight hours.
a lot
In May 2007 a British man named Tony Wright stayed awake for 266 hours, just a little more than 11 days.
2 days
The old man had gone 84 days without catching a fish.
I think it is about ywo weeks a man can live without food.
A man can live without water for 1 day.