Tom Cruise sleeps in a sound-proof 'snoratorium.'
Winston Churchill took a two-hour nap every day.
Mariah Carey surrounds her bed with 20 humidifiers and needs 15 hours of shut-eye per night.
"I've got to sleep 15 hours to sing the way I want to," Carey told Interview magazine in 2007. She also admitted to sleeping with 20 humidifiers around her bed.
"Basically, it's like sleeping in a steam room," she said.
All of Stephen King's pillows are pointed in a certain direction.
According to Lisa Rogak's book "Haunted Heart: The Life and Times of Stephen King," the science fiction writer explains his odd night-time ritual as:
"I brush my teeth, I wash my hands. Why would anybody wash their hands before they go to bed? I don’t know. And the pillows are supposed to be pointed a certain way. The open side of the pillowcase is supposed to be pointed in toward the other side of the bed. I don’t know why."
next slide will load in 15 secondsSkip AdSkip AdLeonardo da Vinci's sleep schedule included 20-minute naps every four hours.
Da Vinci followed an extreme form of a polyphasic sleep schedule called the Uberman sleep cycle, which consists of 20-minute naps every four hours.
This unconventional sleep cycle may have given the artist/inventor/scientist more awake time during his days, but could have also made it difficult for him to work on long-term projects.
Eminem puts tin foil on his windows to keep out the light.
Most people put dark shades on their windows to keep their rooms dark, but rapper Eminem takes it to another level by wrapping tin foil around his windows to get better quality sleep.
Novelist Emily Brontë walked around in circles until she fell asleep.
Marissa Mayer catches up on sleep during weeklong vacations every four months.
Charles Dickens slept facing north to improve his creativity.
next slide will load in 15 secondsSkip AdSkip AdMichael Phelps sleeps in a chamber that's 8,500 to 9,000 feet above sea level.
By placing his bedroom at this high altitude, Phelps decreases oxygen, which forces his body to work harder to produce more red blood cells and deliver oxygen to his muscles. It also helps Phelps increase his endurance performance and prepare himself for competitions at high elevations.
"Once I'm already in my room I still have to open a door to get into my bed," Phelps said on CBS News program "60 Minutes" in 2012. "It's just like a giant box. It's like 'boy and the bubble.'"
Inventor Nikola Tesla never slept for more than two hours a day.
Tesla got more out of the day with his limited sleep schedule. He claimed to never sleep for more than two hours a day and reportedly once worked for 84 hours in a lab without sleep.
"I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success ... Such emotions make a man forget food, sleep, friends, love, everything," he said.
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