Most folks are familiar with S.E.T.I. (Search for Extraterrestrial Intelligence), and when discussing it myself, one of my very favorite examples to give is perhaps the most famous imagery associated with it; large arrays of radio transmitters and satellite dishes. However, fewer people realize that, much like a regular conversation, communication with possible extraterrestrials can go two ways, also.
Active SETI (also known as METI, or “Messaging to Extra-Terrestrial Intelligence”) consists of the act of sending signals into space, with the intention of aliens receiving them. But is this practice dangerous?
Stephen Hawking, in his book A Brief History of Time, suggests that “alerting” extraterrestrial intelligences of our existence is not only dangerous, but that it
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