Animal sleep
All animals need sleep.some sleep standing up because
otherwise there ligaments and tendons can lock into place.
The only time they sleep lying down is rem sleep which is deep
sleep.in herds one half is in rem sleep the other half is just
sleeping normally. some animals sleep very little like giraffes
adult giraffes sleep less than five hours a day.did you know
some birds sleep while they fly.can
You believe that trying to sleep while sleeping.Dolphins
can turn off half their brain to sleep then they swap sides
but how?dolphins have to come up to the surface to breath
it would make it hard to sleep.sperm whales stay motionless
floating when they sleep and they can hold their breath for
90 mins they sleep.some sharks do it to.
