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Only in physics can a few quintillionths of a meter be cause for excitement.
The Large Electron-Positron Collider operational in 1989 at CERN laboratories near Geneva, Switzerland, can discern particles as small as 10 quintillionths of a meter.
At the European Center for Nuclear Research (CERN), the Large Electron-Positron collider can discern particles as small as 10 quintillionths of a meter.