If you want to be productive – like, really productive – you have to get up at 5 AM, right? It sure seems so, if highly successful people like Elon Musk or influential characters like Casey Neistat are to be believed. But take a closer look at the science and you’ll find 2 surprising facts. First, only a tiny fraction of people can function well on less than 8 hours of sleep per night (they’re basically genetic outliers). Second, sleeping less may give you more hours in the day, but sleep deprivation deteriorates your ability to focus and work to such a degree that you may as well not be working at all…