"Life on Mars?" is not mainly asking about another planet. It is asking what kind of escape is left when ordinary life, cinema, news, celebrity, nationalism, and violence have all started to resemble the same show.

The lyric begins with a girl trapped in a small domestic refusal. She turns toward the screen, but the screen does not give her a clean elsewhere. It gives her repetition, boredom, spectacle, wrong bodies punished, and images that keep changing before they can become meaningful. The film is supposed to be the way out. Instead, it shows her the larger version of the same confinement.

That is why the title question works. It is not a punchline, and it is not simple science-fiction wonder. It is the shape of wanting another frame when the available frames have gone stale. Bowie's controlled lift and the bright arrangement make the question beautiful, but the beauty does not answer it. The song leaves the listener with spectacle, exhaustion, and a question large enough to hold both.