Large Hadron Collider

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Tunnel location The illustration shows the location of the 27km long tunnel (blue) below the Swiss-French border. The experiments will take place in different subterranean caverns connected to the surface by 50 to 150 long shafts. (Picture: Philippe Mouche, 1. September 2006) Philippe Mouche

Transfer tunnel Engineers work in the transfer tunnel. (picture: Cern, July 1, 1999) cern

Titan tunnel Diggers make room for the LHC. Patrice Loiez

Superconducting magnet The last of 1,746 superconducting magnets is dropped through a shaft into the LHC tunnel. (Picture: Maximilien Brice, 26. April 2007) Maximilien Brice

Electronics check An engineer checks the electronics of an instrument used to decrease the magnet's temperature. (Picture: Brice/Marcello, 15. Oktober 2007) Brice/Marcelloni

900-ton disc It takes ten hours to put the giant disc into position. Maximilien Brice

Deep freeze A scientist checks the functions of a space that can be cooled to -180°C. Claudia Marcelloni

Art and science A data simulation in the detector Atlas. Atlas experiment

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The world's largest and most expensive science project.