👉 Heterochronism is a genetic condition that occurs in humans and some other animals where the body's internal clock (the circadian rhythm) is disrupted. This means that the body's internal timekeeping mechanism, known as the circadian clock, does not synchronize properly with the body's external environment. In other words, when we sleep, our circadian clock is "heterochronous." It has a different rhythm for sleeping and waking up than when we are active. This means
