Add Yahoo as a preferred source to see more of our stories on Google. Every time two beams of particles collide inside an accelerator, the universe lets us in on a little secret. Sometimes it's a ...

Planned to be the largest particle accelerator in the world, China's Circular Electron Positron Collider (CEPC) was meant to be about 100 kilometers or 62 miles long. That's much bigger than CERN's ...