4 hours
how many hours of sleep does a elephant sleep
6
6 to 9 hours a day.
Approximately 3,600 hours per year.
i think that astronauts usually get about six hours of sleep every night when they are in space.
They should sleep about 8 or 9 hours a night.
They can sleep for a couple of hours in the day and 12 hours at night.
Less than 8 hours.
Well about 9 or 10 hours a night.
Ostriches sleep sitting down, at dark, and sleep off and on through out the night.
Ages 13-18 need about 8 to 10 hours of sleep. Adults between 25 and 64 years of age need an average of 7 to 9 hours of sleep per night. Adults 65 and older need 7 to 8 hours per night.
This will vary by person and can depend on how many hours of sleep you get each night. If you average approximately 7 hours of sleep per night, you can expect to sleep 22 years. If you average 8 hours of sleep per night, you can expect to sleep about 25 years. It is accurate to assume that you will have spent about a third of your life sleeping.