A child’s spinning top loses rotational energy and slows down on its own; hooked to a generator, it decelerates much faster. Astronomers look for the same effect in stars: unusually slow rotation could betray alien technology. After digging through the Kepler telescope archive, which spent years measuring brightness (photometry) and monitoring planets around 6725 sun-like stars, scientists found two “slowpokes” whose rotation lagged far behind the evolutionary norm. But one is slowed by an unseen companion, and the other’s data were smeared by a neighboring star. No techno-signatures were found, but a limit was set: such harvesters appear no more than once per 2000 stars. The method’s main asset is stealth: it doesn’t hunt for heat but catches hidden deceleration. Future surveys with spectroscopy (chemical makeup), radio observations, and interferometry (ultra-sharp imaging) will sift millions of stars, accounting for star formation and metallicity (heavy-element fraction). Twist: to leave a noticeable trace, a civilization would need to extract 94% of the rotational energy, like braking the Sun to a halt in a billion years. The idea is fueled by the work of founding fathers: William Borucki (Kepler mission) and Subrahmanyan Chandrasekhar (stellar evolution).