In a recent Forbes article, astronomer and writer Ethan Siegel called for a big new particle collider. His reasoning was unusual.
Typically, particle colliders are created to test theories - physicists' maths show that undiscovered particles ought to exist, and experimentalists use colliders to see if they really do. This was the case with the Large Hadron Collider built in Europe with the express purpose of detecting the elusive Higgs boson. It succeeded at that task, earning a Nobel Prize for the theorists who first predicted the particle.