Very interesting article in The Guardian today reporting on a study that revealed how poor sleep is not necessarily a symptom of modern life, because actually tribes without internet, TV, electricity etc. still follow similar sleep patterns. Hmm who'd have thought it.
http://www.theguardian.com/science/2015/oct/15/modern-life-is-rubbish-sleep-is-just-the-same-as-ever-say-scientists