BrainCraft | What Makes Someone a Night Owl? | Season 3 | Episode 33 | PBS

Are you a morning person or a night owl? I've never been an early bird – and lately I've been wondering why. This pattern in your sleep/wake cycle is called your "chronotype" and appears to be influenced by your genetics. It has some interesting effects on your health – from some people being more agreeable and proactive to others eating and drinking more. Do you notice an effect on your health?