Cern has revealed that the gremlin that took down the Large Hadron Collider was actually a faulty transformer.
Although the launch went off without a hitch (or the end of the world) the LHC has not actually collided any particles yet after a problem shut down operations.
Cern has now revealed that the reason for the delay was a transformer in the cooling plant for the LHC.
"The transformer, weighing 30 tonnes and with a rating of 12 MVA, was exchanged over the weekend, said Cern in a press release.
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"During this process, the cryogenics system was put into a standby mode with the two sectors kept at around 4.5K.
"Since the beginning of the week the cryogenics team have been busy re-cooling the magnets and preparing for operation with beam, which is currently forecast for today."
It's taken a while to fix, although you could probably posit that 30 tonne transformers are thin on the ground – but now the scientists can get on with Armageddon.