LEONARDO DA VINCI
The ultimate Renaissance man had a remarkably productive career, painting and drawing the likes of the Mona Lisa as well as dreaming up a helicopter prototype. How did he fuel his fruitful life? The ‘Uberman’ sleep cycle, of course. Rather than sleep for a clump of hours each night, Da Vinci is said to have taken a 20-minute nap every four hours in order to boost his productivity throughout the day. This habit is also known as a polyphasic sleep cycle.