Quantum Communication Between the Stars?

Earthlings haven�t made many deliberate broadcasts to extraterrestrials, but in 1974, as part of a ceremony at the economy-sized Arecibo radio telescope, the observatory staff arranged to beam a three-minute message to a few hundred thousand stars in the constellation of Hercules.



The message consisted of a simple picture showing the structure of our solar system and the structure of ourselves � DNA and its chemical building blocks. Innocuous enough...




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