That very interesting! I think we have lost a lot of our connection with nature and that is why we are so out of sync. Of course it wouldn’t work to always wake up when the sun rises or go to bed when it sets. But at least more often try to wake up in rhythm with nature. I thought about getting this “alarm clock” that is supposed to imitate a sunrise with a similar light spectrum, the only problem is that me and my wife most often wake up at different times so it’s not really optimal.