Never before has so much money been spent looking for something so small. On Tuesday, the $10 billion Large Hadron Collider resumed its mission to see new particles, as scientists try to unlock the secrets of the universe’s earliest moments and of poorly understood dark matter. For the last 10 days, CERN researchers have watched as 10 beams of protons raced around a 17-mile tunnel on the border between France and Switzerland. And on Tuesday, using unprecedented quantities of energy through superconducting magnets, they crossed the streams in hopes of observing collisions between the tiny particles. These could produce other fundamental particles that have never been seen before. The hope is to recreate, on a miniature scale, events similar to those that occurred in the seconds after the Big Bang.