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
고생물학은 고대 생물의 화석을 연구하는 학문입니다.gosaengmulhak-eun godae saengmul-ui hwasog-eul yeonguhaneun hakmun-imnida.Paleontology is the study of fossils of ancient organisms.