Yes, it is possible to dream about trying to sleep.
Yes it is possible to sleep at will because eventually you will just doze off.
No, but it is possible to do it in a near-sleep state and not remember it later.
Neender
The patient will neither sleep nor he will allow his doctor to sleep.
good question but its as simple as possible.
Yes, it is possible to sleep in Heathrow Airport. The airport has designated rest zones, lounges, and hotels where passengers can rest or sleep during layovers or delays.
yes, it's called talking in your sleep.
i think not possible to write in space
If possible, we go to sleep.
to write sleep and eat
If you are doing a sleep poster you could write about how we need sleep and the effects of not having any sleep. you could also do it about sleep walkers and nightmares/ dreams. i hope this is helpful to you.