'Western society is chronically sleep deprived': the importance of the body clock"

The 2017 Nobel prize for medicine was awarded for the discovery of how our circadian rhythms are controlled. But what light does it shed on the cycle of life?

https://www.theguardian.com/science/2017/oct/06/western-society-is-chronically-sleep-deprived-the-importance-of-the-bodys-clock