So you've always craved a koala for a pet. Well, wake up to the truth: koalas are a snooze! They top the list of sleepiest sleepyheads in the animal kingdom. The critters shown here spend more than half the day in dreamland. How long do you sleep?

1. Koala - sleeps up to 22 hours

2. Sloth - sleeps up to 20 hours

3. Armadillo - sleeps up to 19 hours

4. Opossum - sleeps up to 19 hours

5. Lemur - sleeps up to 16 hours

Source: The Top 10 of Everything, 1997, by Russell Ash (DK Publishing Inc.)

Daily News from TIME for Kids

October 24, 1997 World Report