Sleep is one of the most misunderstood processes in the world, with the majority of research into sleep being carried out within the past 40 years. So we have found our most interesting facts that you probably didn’t know about sleep.

Animals Sleeping Habits

Giraffes sleep for the shortest amount of time compared to other animals, they require only 1.9 hours of sleep everyday. Whereas bats sleep for the longest amount of time, with them spending roughly 20 hours of the day asleep. Pandas, sloths and bats are some of the laziest animals in the world.

Human Sleep

Humans are the only mammal that willingly delay sleep and on average, we spend 1/3rd of our lives sleeping! The world record for the longest period without sleep is 11 days. This was set by a Californian student named Randy Gardner in 1964. This is definitely not recommended, however, as Randy experienced extreme sleep deprivation and others have died staying awake for this long. 4 in 10 people sleep in the foetal position, other sleeping positions include: The log, yearner, starfish, soldier and free faller.

Dreams & Nightmares

Researchers have found that the most common emotion expressed during nightmares is not actually fear, it is more a feeling of sadness and guilt. This is because dreams/nightmares are your brain’s way of sending you a message, this is why they often tend to be so vivid and relatable to reality. Within 5 minutes of waking up you forget 50% of the dream that you had before awakening. Approximately 10% of people dream entirely in black and white, during the era of black & white tv’s, this percentage was at around 80%.


Although sleep still isn’t fully understood, we found these facts to be quite remarkable. It’s interesting to see that humans are the only mammal that willingly delay sleep, animals sleeping habits differ hugely to our own. Dreams and nightmares are still being researched to this day, but we do know that they are easily forgotten. They are also your brains way of sending you a message with your dreams often having relevance to your real life situation.

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