\" \" This aerial view shows the difference in size between the current Large Hadron Collider and the new Future Circular Collider proposed by physicists at CERN. CERNWhen the world's largest and most powerful particle accelerator, the Large Hadron Collider (LHC) went online in 2008, it became the most powerful and complex machine humans had ever created. Still, some physicists are skeptical that a new particle accelerator is even necessary. Now That's Interesting One of the jobs of atom-smashers is to figure out how dark matter works. Dark matter is tough to spot because it does not interact with electromagnetism .