The average is 8 hours, some people require 10 hours and there is approximately 35% that only need six hours (I'm one of those people.) It depends if you have REM sleep (deep sleep) and if you do then even six hours is enough for many people. If you are a lighter sleeper then 8 - 10 hours is a must. Children from 1-19 need at least 10 hours of sleep each day.
My doctor has told me that tweens need 9 hours of sleep a night! A Sleep Doctor should tell you to sleep 10 hours of sleep not 9 hours. Now Adult can sleep up to 6 hours, there bodys don't need that much sleep:)
at least 8 hours of sleep
Lizards needs 11hrs of sleep
an adult need sleep of maximum 8 hours.
between 5-7 hours of sleep. Children need at least 7-8 hours of sleep
alot
Because they haven't had as much sleep as you have and they need to catch up on their sleep and that is why the older they get the less they sleep beause they are getting caught up.
8 or more
A labrador retriever needs as much sleep as other dogs, 12-14 hours.
The amount of sleep may vary so much, although most of adults get restored after 5 to 8 hours of sleep.
How much sleep does a 11 year old need of sleep Optimally, 8-10 hours is what you should be looking at around 11 years of age.
Lions sleep more on their side then on their backs.