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Large Hadron Collider retired for upgrades

Rob Beschizza
Jun 29, 2026
∙ Paid

CERN

CERN’s Large Hadron Collider has collided its last hadron. The 27-kilometer (17-mile) ring, buried dozens of meters underground on the French and Swiss border, begins decommissioning today. The collider will not be dismantled, but upgraded as the High Luminosity Large Hadron Collider—a project that will take several years.

“So long #LHC and thank you…

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