Yes, I've heard about this too, on some history programme.
It did impress me at the time, but I always come back to the fact that I on the average don't get enough! Chronically sleep-deprived is right....
Sometimes there are thoughts that have woken me, but I have to take about an hour before I realise what they are - trying not to think about them, obviously!
I'm actually beginning to feel tired. That's another thing, when I sleep in the afternoon it's usually late before I can sleep again, but this time..
Goodnight, folks.