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
홍수설은 지구의 역사에서 중요한 이론 중 하나입니다.Hongsuseol-eun jigu-ui yeogsaeseo jungyohan il-eon jung hanabnida.The diluvial theory is one of the important theories in the history of the Earth.