Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
흑성은 동물의 색소가 과도하게 증가하는 현상입니다.Heukseong-eun dongmul-ui saeksoga gwadohage jeungga-haneun hyeonsang-imnida.Melanism is a phenomenon where the pigmentation of an animal increases excessively.