4 ideas
In one story a whole society lives in continuous free fall through air, so falling is not an event for them but the ordinary condition of life. One member of this people sets out to work out why they fall, and the story follows that reasoning from inside a world that has never known solid ground.
Bodies falling together feel weightless and see nothing moving relative to one another, so a falling people cannot sense their fall directly. Discovering it means reasoning from indirect evidence to a cause everyone else treats as the unquestioned background of life.
Climate change is too slow and too spread out for any single human observer to perceive it directly. A network of many sensors pools readings across space and time, turning an invisible trend into a legible pattern, so the knowledge lives in the network rather than in any one viewpoint.
When a working physicist writes speculative fiction, the invented premise, such as permanent falling, is treated as a physical system with consequences that can be reasoned out. The drama comes from characters doing science: noticing an anomaly, forming a hypothesis and working out a mechanism. That makes the story a model of inquiry as well as a narrative.