Your brain “grew up” when times were really scary. Humans had many more dangers than they do today. When you are sleepy, your brain wants to rest, but if you tell it no, your brain thinks maybe there is danger and we need to be up and alert. So after a bit of trying to sleep, your brain switches back to awake mode assuming you are staying up to be alert of danger.
Your brain “grew up” when times were really scary. Humans had many more dangers than they do today. When you are sleepy, your brain wants to rest, but if you tell it no, your brain thinks maybe there is danger and we need to be up and alert. So after a bit of trying to sleep, your brain switches back to awake mode assuming you are staying up to be alert of danger.