The Large Hadron Collider (LHC) will restart on Friday after a three-year hiatus and is expected to resolve a scientific cliffhanger on whether a mysterious anomaly could point to the existence of a fifth fundamental force of nature.
The tantalising findings reported last year have reignited hopes that the 20 mile-long collider could deliver a second blockbuster discovery, more than a decade after the Higgs boson.
