Live stream – Particles and Parallel Worlds: The Science Behind 'His Dark Materials' Use the player below to watch Particles and Parallel Worlds: The Science Behind 'His Dark Materials' from 7pm on Thursday 3 March 2022. Off Live stream Ask a question A world top-100 university We're a world top-100 university renowned for the excellence, impact and distinctiveness of our research-led learning and teaching. About the University