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Caption: ATLAS experiment. Animation of the ATLAS (a toroidal LHC apparatus) particle detector and a logarithmic timeline showing the epochs in the primordial era of the universe. This illustrates the conditions the ATLAS experiment is hoping to recreate and observe. ATLAS is located at the Large Hadron Collider (LHC) at CERN, the European particle physics laboratory near Geneva, Switzerland.

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Keywords: a toroidal lhc apparatus, astronomical, astronomy, astrophysical, astrophysics, atlas, big bang, cern, cosmic, cosmological, cosmology, cosmos, electroweak epoch, epochs, era, european particle physics laboratory, hadron epoch, history, inflation, lepton epoch, logarithmic scale, particle detector, periods, photon epoch, primordial, quark epoch, start of the universe, subatomic particles, timeline, universe