Hellow guys, Welcome to my website, and you are watching [지구과학2] 1단원 2차시 원시 지구의 탄생과 진화 & 지구 대기의 변화. and this vIdeo is uploaded by 지구주샘 at 2020-04-12T22:13:01-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
