What animal sleeps 18 to 20 hours a day?
The
sleepiest animal in the world is the koala, who sleeps 22 hours a day.
Next is the sloth (20 hours), armadillo and opossum (tied at 19 hours
each), lemur (16 hours), then hamster and squirrel (tied at 14 hours
each).
Source : http://www.neatorama.com/2008/04/26/trivia-the-sleepiest-animal-in-the-world/
Source : http://www.neatorama.com/2008/04/26/trivia-the-sleepiest-animal-in-the-world/