I think @pamelaspence posted something about this - wonder if it was the same research! Hope you’re having an excellent start to your week @PaulaD and managed to get some rest over the weekend! Happy Monday.
Indeed - looks like the same basic article that’s doing the rounds. I picked it up on the BBC. It’s an interesting thought - that when we depended more on natural light for our sleep cycle, we naturally wakened after a few hours and that the industrial revolution is largely what put paid to that! Here is a link to the previous chat. Medieval sleep patterns (Biphasis sleeping)