The spontaneous appearance in modern people of signs characteristic of distant ancestors.

Modern man sometimes shows signs of ancient ancestors. They are called atavisms. This is one of the facts that confirmed evolution. Basically, these manifestations are in infants. Sometimes they can appear a little later. But they are associated with the genetic code and heredity. For example, a person may be born with extra mammary glands or with an elongated tailbone. All this is quickly corrected by surgery. A few years after birth, the body may have abundant hair.