Scientific American complacently proclaimed in 2015: Alien Supercivilizations Absent from 100,000 Nearby Galaxies.

What was their reason to state it?

The most far-seeing search ever performed for “Dyson spheres” and other artifacts of “astroengineering” comes up empty.

The aforecited study came half a year before the discovery of striking properties of KIC 8462852.

And it is not alone. The aperiodically dimming stars, Schmidt writes, occupy a limited region of the HR diagram; also an apparent clustering in space is found.

Whatever it is, it surely looks like an expanding front of something an inventive space engineer would have been proud of.

Indeed, there currently isn’t any ISO-certified Dyson sphere in our astronautical charts, albeit if we even possess such evidence, it’d be, probably, equally hard for us to decipher as the true meaning of powered-down, battery-drained ebook for creators of the Behistun inscription, pretty clever and skilled artisans by their own right.