Because their stomach expands and pushes on their lungs causing them to be un able to breath.
No.
On hills, in the trees, in barns or sheds, in the grass or dirt, etc. Most cattle love to sleep on hills because they can easily see predators approaching from below.
they cant sleep pendejos!!
Yes, it is possible to burp in your sleep. Burping is a reflex action that can occur when excess air in the stomach is expelled. If you swallow air before going to sleep or have certain medical conditions, you may burp while sleeping.
no, you cant sleep with a stomach during pregnancy
They do sleep on their sides because if they slept face down or face up they would suffocate
...sleep.
They can.
Insomnia
they dont
Is there any reason you think you cant sleep? have you tried valerian tea,
Different stage of sleep. Dreams happen in REM sleep.