The first high-energy collisions between particle beams have taken place at the Large Hadron Collider, ending more than a year of frustration for scientists in Geneva.
Collisions occurred just after noon BST, five hours after scheduled, but well within the time frame expected by scientists at the European Centre for Nuclear Research (CERN).
“This is a major breakthrough. We are going where nobody has been before. We have opened a new territory for physics,” said Oliver Buchmueller, one of the key figures on the Cern project.
The atomic particles smashed together in head-on collisions, with each beam having an energy of 3.5 trillion electron volts. By creating ultra-high energy collisions, scientists hope to mimic the conditions moments after the Big Bang.