Hellow guys, Welcome to my website, and you are watching [과학관에서 놀자] '돌'이 알려주는 지구…우석헌 자연사 박물관 / YTN 사이언스. and this vIdeo is uploaded by YTN 사이언스 at 2017-08-17T20:53:31-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
