Researchers at the world’s biggest particle accelerator in Switzerland have submitted proposals for a new, much larger, supercollider.
Its aim is to discover new particles that would revolutionise physics and lead to a more complete understanding of how the Universe works.
If approved, it will be three times larger than the current giant machine.
But its £12bn price tag has raised some eyebrows, with one critic describing the expenditure as "reckless".
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