Cracked by Anirudh Patil alone. Brilliant stuff!
Source: Crop Circle Research dotcom
Answer: The Arecibo Message was beamed into space in 1974 and a hoax(?) reply in the form of a crop circle was seen near Chilbolton radio telescope in Hampshire, UK in August 2001.
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radio transmission that SETI (the Search for Extra-Terrestrial Intelligence) sent from the Arecibo radio telescope in 1974.
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http://www.musicaloud.com/category/spotlight/music-trivia/
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