I recently stumbled upon this very interesting blog post by the famous Steve Pavlina, about him trying out biphasic sleep. Biphasic sleep basically means sleeping two times a day instead of the usual one.
THE BENEFITS OF GOING BIPHASIC
Some people believe that sleeping this way is more beneficial because it saves them more time. This is because, when you sleep multiple times a day, you theoretically need less sleeping time each time than you would with just one huge chunk.