Why does physics matter? What can the study of energy and force, of matter and its motion and behaviour through space and time teach us about the universe and the nature of reality itself? According to Jim Al-Khalili, the renowned physics professor and host of BBC Radio 4’s The Life Scientific, we all need to understand the three pillars of modern physics — quantum theory, relativity and thermodynamics — if we are ever to have a full grasp of reality and our place in this universe. In this week's episode he spoke to presenter Helen Czerski about his new book 'The World According to Physics' and if you'd like to buy it click here:  https://www.primrosehillbooks.com/product/the-world-according-to-physics-jim-al-khalili/

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