"But Davies believes it is wrong to assume that extraterrestrials who may be hundreds of millions of years ahead of us technologically will have chosen to communicate by radio."
I devote some of "After the Martian Apocalypse" to exactly the same possibility; how much of our so-called "junk" DNA is molecular white noise? Could there be a genetically encoded message we've missed in our haste to discover interstellar radio transmissions? More excitingly, is it a "signal" we can biologically activate and express?
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