As the Large Hadron Collider switches off its beams for a four-year overhaul, the question is no longer what it has found but whether anything bigger is worth building

The Large Hadron Collider (LHC), the world's most powerful atom smasher, was switched off on Monday night ahead of major upgrades.

As the Large Hadron Collider switches off its beams for a four-year overhaul, the question is no longer what it has found but whether anything bigger is worth building