411 REFERENCE · Wikibooks
Free Knowledge Culture Calendar/November 16
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
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Today in 1974 humanity made its first attempt at intergalactic communication by sending the Arecibo message. We have not yet received an answer from E.T., which will not be possible for about 60,000 years due to the stagnating progress in physics.
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