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This episode features French physicist and science communicator Christophe Galfard. His background is in theoretical physics and Christophe worked with Professor Stephen Hawking as his PhD student at Cambridge University. I worked with Christophe in 2016, where he co-presented Search for a New Earth with Danielle George. He was also the solo presenter of a French-language version of the programme. While working on his PhD with Hawking, Christophe focused on black holes as an area which challenges the theories around the very big and the very small, touching as they do on both gravity and quantum physics. Since finishing his PhD Christophe has been focused on the importance of communicating science to a broader audience. With Stephen Hawking and his daughter Lucy Hawking, he co-authored a children’s book and went on to publish a science fiction trilogy for 9-13 year olds. He has gone on to write books for adults including the international bestseller The Universe in Your Hand and he is a very busy public speaker with various TED talks under his belt aswell as numerous speaking events around the globe. I hugely enjoyed getting to know Christophe on the road while filming, I really enjoyed this opportunity to dig into some of the questions I didn’t get to ask when filming together. I learnt a lot about black holes, gravitational theory, quantum physics and the current understanding of our amazing universe. I hope you enjoy the conversation as much as I did.