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A better approach is to note that the nearest intelligent extraterrestrials are likely to be at least dozens of light-years away. Even assuming that active SETI provokes a reply, it won’t be breezy conversation. Simple back-and-forth exchanges would take decades. This suggests that we should abandon the “greeting card” format of previous signaling schemes, and offer the aliens Big Data.
For example, we could transmit the contents of the Internet. Such a large corpus — with its text, pictures, videos and sounds — would allow clever extraterrestrials to decipher much about our society, and even formulate questions that could be answered with the material in hand.
While I still agree with Stephen Hawking on the idea of ‘active SETI’, I think that there’s merit in the idea of exposing other nearby civilizations to what we’re really like, warts and all. Because as soon as they decoded our transmissions well enough to understand the comments section of pretty much any major site on the web, they’d either completely wall off our solar system* and post warnings around it or just trigger our sun to go supernova. Either way, we’d never know what happened, and the rest of the galaxy would be safe …
*gee, that’d make an interesting premise for a SF novel, doncha think?
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