지구의 비밀을 밝히다
??? ???? ??? ??? ?????. ??? ?? ??? ???? ??? ??? ????. ??? ??? ???? ??? ???? ???? ?? ???? ????. ???? ???
??? ???
??? ??? ?????, ??? ??? ???? ??? ??? ???? ???
?? ???
?? ??? ??? ???
??? ???? ???? ?? ??. ??? ? ?? ??? ??? ?????, ??? ??? ?? ???. ??? ??? ???? ???? ??. ??? ??? ?? ??? ?? ???. ??? ???