This is unfortunately the kind of cultural aversion to "night owl" sleep patterns that I'm talking about. People were sleeping at different times of day even in

This is unfortunately the kind of cultural aversion to "night owl" sleep patterns that I'm talking about. People were sleeping at different times of day even in the absence of electric artifical light. [0] https://www.bbc.co.uk/news/science-environment-40568997 https://www.bbc.co.uk/news/science-environment-40568997