According to our best theories of physics, the fundamental building blocks of matter are not particles, but continuous fluidlike substances known as 'quantum fields'. David Tong explains what we know about these fields, and how they fit into our understanding of the Universe.
Watch the Q&A here:    • Q&A  Quantum Fields: The Real Buildi...  
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David Tong is a professor of theoretical physics at Cambridge University, specialising in quantum field theory.

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