Our solar system does not exist in isolation. It formed within a stellar nursery along with hundreds of sibling stars, and even today has the occasional interaction with interstellar objects such as 'Oumuamua and Borisov. So it's reasonable to presume that some interstellar material has reached Earth. Recently Avi Loeb and his team earned quite a bit of attention with a study published in Research Notes of the AAS, arguing that they had found some of this interstellar stuff on the ocean seabed. But a new study finds that the material has a much more local origin.
