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CERN is home to one of the biggest machines in the world, the Large Hadron Collider – which famously detected the Higgs Boson in 2012. Physicists Dr Tara Nanut and Dr Dave Barney explain why the laboratory is proposing to build a new, bigger collider, called the Future Circular Collider – which would measure 62 miles (100km) around and could cost more than £20 billion.

(Image: Artist's illustration of Future Circular Collider tunnel, Credit: CERN.)

Video by Anand Jagatia.