Speaking of time and sleep, I have always been fascinated with the concept of "first sleep, second sleep". https://www.bbc.com/future/article/20220107-the-lost

Speaking of time and sleep, I have always been fascinated with the concept of "first sleep, second sleep". https://www.bbc.com/future/article/20220107-the-lost-medieval-habit-of-biphasic-sleep https://www.bbc.com/future/article/20220107-the-lost-medieva... I have tried it - it's like having TWO mornings in one day. It's kind of amazing, but it's completely incompatible with modern life (although less so with the new regime of more work/life balance flexibility).