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| Description: Human Memorabilia in Space (a) Humans have beamed radio signals into space, hoping that the message will someday be intercepted by an alien civilization. This is a visual version of the signal sent in 1974 from the Arecibo radio telescope toward the globular cluster M13. The Pioneer and Voyager spacecraft, now in interstellar space, also carry messages from Earth Picture Stats: Views: 784 Filesize: 141.65kB Height: 473 Width: 1350 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18818 |