The LHC or the Large Hadron Collider is experiencing some problems. Due to a recent helium leak it'll be out of service for two months.
The leak means that the LHC will be down for at least two months, because workers must now warm up the faulty sector of the tunnel in order to repair it. The liquid helium is used to cool the LHC's magnets -- which guide protons and accelerate them so they can be smashed together -- down to within 1.9 kelvins (3.4 degrees Fahrenheit) of absolute zero.
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