@thebrainmaze: Waking around 3 a.m. may reflect an ancient pattern called segmented, or biphasic, sleep. People once commonly slept for several hours, woke around midnight to talk, tend fires, visit neighbors, or rest quietly, then returned to bed for a “second sleep” until dawn. Artificial light and modern schedules gradually replaced this two-part rhythm with one continuous night of sleep.

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Wednesday 05 August 2026 04:02:47 GMT