Neoteny

The retention by adults of traits previously seen only in the young is a subject studied in the field of developmental biology, occurring in two ways. In neoteny (/niːˈɒtᵻni/ /niːˈɒtni/ or /niːˈɒtəni/, also called juvenilization), the physiological (or somatic) development of an organism (typically an animal) is slowed or delayed. Neoteny is found in modern humans.

Neoteny

The retention by adults of traits previously seen only in the young is a subject studied in the field of developmental biology, occurring in two ways. In neoteny (/niːˈɒtᵻni/ /niːˈɒtni/ or /niːˈɒtəni/, also called juvenilization), the physiological (or somatic) development of an organism (typically an animal) is slowed or delayed. Neoteny is found in modern humans.