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| Description: Here, the span of Homo sapiens sapiens’ time on earth is compared with that of all life beginning about 3.5 billion years ago. If the length of this time line were 1 kilometer (0.6 miles), humanity’s time on earth would occupy roughly the last 3 one-hundredths of a millimeter. That is less than the diameter of a hair on your head—compared with 1 kilometer of time. Picture Stats: Views: 3226 Filesize: 74.5kB Height: 706 Width: 1475 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=8865 |