Why Your Body Clock Isn’t 24 Hours

If you were left in a cave without a watch, your internal "day" wouldn't be 24 hours

long. On average, the human internal clock runs slightly slow,

with a natural period of about 24.18 hours. This means that without external cues like sunlight

to reset us, our bodies would naturally drift later and later every single day.

This synchronization process, known as entrainment, is what keeps our biology aligned

with the planet's rotation. For some, like those with Delayed Sleep Phase

Disorder, this genetic timing can be even more pronounced, making a "conventional"

schedule feel like a biological uphill battle. This internal rhythm is largely determined