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
신생대의 지층은 다양한 생물의 화석을 포함하고 있다.sinsengdaeui jicheungeun dayanghan saemul-ui hwasogeul pohamha-go itda.The Cenozoic strata contain fossils of various organisms.