Isn't it great to be a cat?

If you like sleeping, that is....

Cats sleep twice as much as we do. Cats can sleep as much as 16 hours a day, and older cats spend even more time at rest — as much as 20 hours a day. Why could that be?
According to some articles I found, this sleeping habit is a result of the cat’s evolution, nutritional habits, and physiology. In the wild, cats have to hunt in order to eat, and the stalking, chasing, and killing of prey burns a lot of energy. Sleeping helps cats conserve energy between meals.

Of the time cats spend sleeping, about three quarters of it is what we might call snoozing. In that state, cats can get all the rest they need, but they’re still alert enough to awaken at a moment’s notice. You can tell when a cat is in light sleep because their ears will twitch and rotate toward noises and their eyes will be open a tiny bit. Even when they’re sitting upright, cats can slip into that dozing mode.
(Source: www.catster.com)