Recreating Big Bang Matter on Earth

Recreating Big Bang Matter on Earth
AP Photo/Keystone, Martial Trezzini, File

The Large Hadron Collider (LHC) at CERN usually collides protons together. It is these proton–proton collisions that led to the discovery of the Higgs boson in 2012. But the world's biggest accelerator was also designed to smash together heavy ions, primarily the nuclei of lead atoms, and it does so every year for about one month. And for at least two good reasons.

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