HomePodcastsPhysics World Stories PodcastCosmic time capsules: the search for pristine cometsPhysics World Stories PodcastCosmic time capsules: the search for pristine cometsJanuary 23, 2026 · 52 minPlay episodeShare from this pointShow notesAncient icy wanderers like comet 3I/ATLAS, spotted in July 2025, can reveal secrets of our cosmic originsTranscriptAll episodes of Physics World Stories Podcast