You are viewing a single comment's thread from:RE: HOW WE KNOW THAT THE EARTH IS CLOSE TO 4.5 BILLION YEARS OLD.View the full contextwafrica (66)in #steemstem • 7 years ago Hello! I find your post valuable for the wafrica community! Thanks for the great post! @wafrica is now following you! ALWAYs follow @wafrica and use the wafrica tag!