All living creatures in this world need rest. Rest to their body to carry on their next phase or work efficiently. And this rest can be obtained by sleeping. Sleep is a normal state of decreased consciousness and lowered metabolism during which the body rests. And 8 hours a day of sound sleep can boost the body for next day. And people say that pillows have the world’s best solution for ones problem. Hibernation is a technique, which the animals have developed to adapt themselves to harsh climate. In simple words, they sleep continuously for a particular period of time, especially when the food is scarce.