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
기원설은 생명의 기원을 설명하는 여러 이론 중 하나입니다.giwonseol-eun saengmyeong-ui giwon-eul seolmyeonghaneun yeoreo ilheon jung hanabnida.The theory of origin is one of the various theories explaining the origin of life.