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The sleeping habits of the rich, the powerful, and the genius So many inventions, so little time. Despite what science says about how crucial a good night's sleep is to your health and longevity, one thing's clear from the infographic below - some of history's most powerful and intelligent people had very little time for it. Serbian-American inventor, engineer, and fan-favourite, Nikola Tesla, is said to have adopted what's probably the most ill-advised sleeping habit of them all - devoting just five hours a day to rest, only two of which were dedicated to actual sleep. And this wasn't something he implemented when he realised he had too many inventions and too little time. In his book, Prodigal Genius: The Life of Nikola Tesla, author John J. O'Neil says Tesla was terrible at sleeping, even when he was just a boy: "By plugging the keyhole and the chinks around his door, he was able to spend the night hours reading volumes purloined from his father'