Bunny on Instagram: "1. The break wasn’t “rest” — it was a second thinking phase. Medieval court records mention people drafting contracts and wills “after first sleep.” A sleep historian told me, “The clearest thinking happened between sleeps.” During this window, cortisol is low, dopamine is stable, and the brain stops defending identity. That’s why difficult decisions were often delayed until the night break. 2. Deep sleep gets better, not worse. Polysomnography data from nomadic populations