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Circadian Rhythm: The Body's Internal Clock

Circadian Rhythm: The Body's Internal Clock

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Why do we feel sleepy at night and alert during the day? Explore circadian rhythm—the internal clock that regulates sleep, hormones, and energy. Learn how light, lifestyle, and biology keep this rhythm ticking, and what happens when it falls out of sync.

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In the spirit of reconciliation, Audible acknowledges the Traditional Custodians of country throughout Australia and their connections to land, sea and community. We pay our respect to their elders past and present and extend that respect to all Aboriginal and Torres Strait Islander peoples today.