The reason cats love being in boxes is because a portion of the power of Shrodinger’s cat is spread throughout every cat in existence. Certain cats that are similar enough to them are actually immortal within any box they are fully cognizant of. You have used this to make your cat live long enough to understand the universe is actually an infinitely growing box of sorts.
Overwhelmingly fascinated by a breathtaking view of the Earth inside the spaceship, the astronauts were abruptly interfered by a knocking sound on the spaceship hatch. The knocking persisted as if it’s waiting to be let in. The astronauts looked at one another, puzzled & spooked.