The smallest is a sub-atomic particle discovered on this Particle Decay Scatter image from a collision experiment within the Large Hadron Collider (LHC). This machine is one of the largest experimental-science machines ever built by humans. The LHC is the largest particle accelerator in the world. Located at CERN laboratories in Switzerland, this 27-kilometer ring-shaped race track accelerates two beams of high-energy particles to near the speed of light before they are focused to collide. As the beam particles crash together, they break apart (or split) into any number of sub-atomic particles. In an experiment using high-energy protons as the atomic particles within the colliding beams, CERN scientists discovered the ‘God Particle’. Its existence was first proposed in 1964 from experimental mathematical thought experiments. But we couldn’t confirm the existence of the particle until the experiment in 2012. This is a prime example of theoretical science decades before experimental science catches up