| http://www.w3.org/ns/prov#value | - They were designed to show extra-terrestrial life the origin of the spacecraft in case they were intercepted by alien spacecraft and featured the nude outlines of a man and woman and some other symbols that were intended to help the extra-terrestrials figure out where the craft came from, then blow us to smithereens as depicted in many Hollywood movies.Metal Plaque Uses in the 21st CenturyIn our l
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