Some animals have bizarre sleeping habits. Here are some animals with the most unusual behavior of sleeping. Humans need at least 8-hours of sleep to be able to rest and have sufficient strength for the next day. Over sleep or under sleep will both lead to health problems, sooner or later. Animals too, need to sleep to stay healthy. With the thousands of animal species there are those who have unusual way or habit of sleeping. Check this out.
The giraffe has one of the shortest sleep requirements of any mammal, which is between 10 minutes and two hours in a 24-hour period, averaging 1.9 hours per day