How to Hibernate

The word hibernation comes from the French word is ewehr, which means winter. To be able to do that, you need significant stores of energy in the body. I think one has to revire some parts of the brain to be able to hibernate because typically human beings sleep eight hours between six to eight or six to nine hours a day. Even if you try to sleep, let's say 24 hours, I think it's extremely hard to sleep that long. Did our ancestors hibernate in the past? I don't know if there is any evidence of that, but we are mammals after all. There are other animals also that hibernate. And I'm