Numerous Princeton University researchers will be ready once the Large Hadron Collider is “switched on” after a two-year hiatus during which it has been upgraded to run at a higher energy. Princeton physics professor James Olsen, who oversees all physics results for the collider’s Compact Muon Solenoid (CMS) detector, discusses the discoveries that lay ahead at the LHC. Having uncovered the Higgs particle during its first run, the collider will now be used to produce insights into some of the universe’s foremost mysteries, including the nature of dark matter and a theory known as supersymmetry.