There is one species of Cicada that lives under ground for 19 years but they are not sleeping, they feed of the root sap of the tree that they live under, when they do come above ground, they mate and then die.
galapagos turtle
A snail is the animal that can hibernate or sleep for 3 years. Hibernating is one way a snail can live through very dry weather conditions.
The koala bear is an animal that can sleep for 3 years but only will mate once. Koala bears are typically found in Australia.
10 hours
That is entirely up to the people involved.
Phil 'Philthy Animal' Taylor is 56 years old (birthdate: September 21, 1954).
rats
If a person is already asleep an an animal comes in the same room to sleep then human beings can sleep with animals.
9-12. These ages are the growing years and lack of sleep can cause all sorts of problems including lack of growth.
You can ask your vet to put your animal to sleep in your home. Many vets will oblige this wish if you can show your reasons for it and that it is best for the animal.
Koalas (which are not bears at all, but marsupials) sleep for between 16 and 21 hours a day. This is more than polar bears, which sleep for an averge of 8-9 hours a day.
a turtle