The world's biggest particle accelerator, the Large Hadron Collider, is in full operation after a year of repairs.
The European Organization for Nuclear Research, CERN, said in a statement on Friday that particle beams are once again circulating in the LHC, and that a clockwise circulating beam was established at 10 p.m. in Geneva.
According to the CERN Twitter feed, an anticlockwise beam was also successfully injected, and both beams have completed many thousands of turns of the LHC.
Read more of "Large Hadron Collider up and running again" at ZDNet UK.