Five Years After The Higgs, What Else Has The LHC Found?

It's now just over five years since the two major collaborations at the Large Hadron Collider — CMS and ATLAS — jointly announced the discovery of a new particle with never-before-seen properties: the Higgs boson. It was the first fundamental scalar particle ever discovered, the first particle with spin = 0, the first particle with a rest energy of 126 GeV, and the last predicted, missing particle from the Standard Model of particle physics. With the discovery of the Higgs boson, that Standard Model was finally completed. All the other particles and antiparticles had previously given way to direct detection, and with the Higgs, we've now found every particle that we can predict ought to exist. Yet there are a huge number of unsolved mysteries in physics, and over five years later, the LHC has shown us no new hints of what's next. Here's a recap of what the LHC has and hasn't found, and what it means for what's next.