There are some who fear the start-up of the Large Hadron Collider –a mammoth atomic particle accelerator– saying it will create black holes that will, with a giant sucking sound, consume the Earth and all we hold dear. A NASA scientist I was listening to last night reassured his audience… sort of. When someone asked when was it that the LHC was supposed to begin operations, he replied, "oh, it has been started. And we're not really here."

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