Large Hadron Collider makes first proton collisions in two years
by Ian Sample, science editor from on (#8EHK)
Low-speed test event was preparation for much higher-energy activity next month, which will mark the start of the accelerator's search for new physics
The Large Hadron Collider (LHC) has smashed its first particles together since the machine restarted after a two years hiatus for crucial maintenance and repair work.
The giant subterranean accelerator at Cern near Geneva collided bunches of protons at low energy for several hours on Tuesday morning, spraying subatomic debris into the machine's huge detectors.
