Teething troubles

Since you ask, Cern’s previous machine, the Large Electron Positron collider, had teething troubles too. Weird signals came and went. They realised, eventually, that the machine was reacting to Earth tides: the pull of the moon on the Earth’s crust was making the land around the collider heave up and down, causing a 1mm change in the circumference of the 27km collider ring.

From todays Guadian coverage of the LHC’s first 7TeV collision.