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| Description: Hints of Earth’s Early Appearance (a) Impact craters on the far side of the Moon show what Earth’s very early surface may have looked like. The Moon’s far side, the oldest surface on the Moon, preserves very old impact structures possibly formed between 4 and 4.5 billion years ago Picture Stats: Views: 603 Filesize: 237.28kB Height: 1080 Width: 982 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18961 |