> The natural rhythm of humans is sunrise to sunset There's a pretty common genetic mutation that causes a delay in the natural rhythm. https://www.verywellhe

> The natural rhythm of humans is sunrise to sunset There's a pretty common genetic mutation that causes a delay in the natural rhythm. https://www.verywellhealth.com/genetic-mutation-night-owl-disorder-5087443 https://www.verywellhealth.com/genetic-mutation-night-owl-di...