Quantum Fields: The Real Building Blocks of the Universe - with David Tong

According to our best theories of physics, the fundamental building blocks of matter are not particles, but continuous fluid-like 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: Subscribe for regular science videos: David Tong is a professor of theoretical physics at Cambridge University, specialising in quantum field theory. The Ri is on Twitter: and Facebook: and Tumblr: Our editorial policy: Subscribe for the latest science videos: