Researchers at the Large Hadron Collider (LHC) have discovered a new particle, called Xi-cc++. The name doesn't roll off the tongue very well, but the discovery will help understand how the nuclei of atoms hold themselves together. There are four fundamental forces in the Universe: the weak force, the strong force, the electromagnetic force, and the gravitational force. The strong force is responsible for holding the nucleus of an atom together; for example, a regular helium atom's nucleus has