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- The medieval habit of 'two sleeps' (2022) https://www.bbc.com/future/article/20220107-the-lost-medieval-habit-of-biphasic-sleep 78 comments
- The medieval habit of ‘two sleeps’ https://www.bbc.com/future/article/20220107-the-lost-medieval-habit-of-biphasic-sleep 245 comments
- The forgotten medieval habit of 'two sleeps' https://www.bbc.com/future/article/20220107-the-lost-medieval-habit-of-biphasic-sleep 20 comments anthropology
- The forgotten medieval habit of 'two sleeps' https://www.bbc.com/future/article/20220107-the-lost-medieval-habit-of-biphasic-sleep 10 comments truereddit
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