There are places in this universe that are very different from the planet you and I inhabit. Take, for example, the planet Kinoko in NGC 5194 (the Whirlpool Galaxy). Kinoko is found in a triple star system. Remarkably, all three stars have nearly identical masses and are in a stable, equidistant orbit around a common center of mass. Kinoko rotates all three stars in a rounded triquetra pattern, spending equal time around each star. Kinoko experiences temperate weather when it is near one of the stars and extremely cold conditions when it is travelling between stars. Additionally, dozens of moons are in stable orbit around Kinoko.
While the orbits of the three stars, Kinoko, and the many moons are stable, the likelihood of this configuration happening by chance is astronomically small. In other words, the Kinoko star system was deliberately set up this way. But there are no extant civilizations in the Whirlpool Galaxy that are capable of such an astounding feat of engineering. The Kinokoans are just starting to achieve spaceflight, so they could not possibly have been the ones to do it. But who did?
These illustrations were drawn using Stable Diffusion 2.1.
