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Humans Used to Sleep Twice at Night. Why Did We Stop?

4 18
03.11.2025
If you’ve ever woken up at 3 a.m. and stared into the ceiling, wondering what’s wrong with you, the answer might be nothing. For most of human history, that interruption was built into the night. People slept in two shifts: a “first sleep” and a “second sleep,” with an hour or two of wakefulness between […] The post Humans Used to Sleep Twice at Night. Why Did We Stop? appeared first on VICE.

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