It's an interesting story but it's unlikely that there is any alien machine material on our planet. Interstellar distances are unimaginably vast and there is no

It's an interesting story but it's unlikely that there is any alien machine material on our planet. Interstellar distances are unimaginably vast and there is no technology that allows for travel to neighboring stars. Even if we found "material", it's still composed of elements that are the same for all locations in the cosmos. There are no special elements per se. Chemistry and nucleosynthesis is the same everywhere. I can't rule out unusual isotopes of elements, that is true. So it would be hard to say something came from another star system.