Photo: #Scientists look at computer screens showing traces on the Atlas experiment of the first protons injected in the Large Hadron Collider (LHC) during its switch-on operation at the Cern's press center on Sept. 10, 2008 near Geneva. Physicists fired up the world's biggest atom-smasher in a mission to answer some of the most perplexing questions about the nature of the universe.

Friday Follow: Large Hadron Collider experiment stalls


The world's largest particle accelerator fired up with great fanfare in September. But the long awaited experiment had to be shut down shortly after because of an electrical error. A scientist who witnessed the startup talks about what's next for the Large Hadron Collider.

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