A signal in the dark. A question no one has answered.

Something has been listening back.

This month, our traveler picks up a burst of radio noise lasting exactly 72 seconds, and then it’s gone. It sends his mind back to 1977, when an astronomer circled a signal on a printout and wrote a single word beside it: Wow! It was never heard again. From there, the letter follows one of the great unanswered questions in science, the Fermi Paradox, and an old mystery written into the sky itself: the same seven stars, the Pleiades, appearing in myths from cultures that never spoke to one another.

Every fact in the letter is researched and checked, so you get the chill and the real science together.