Scientists have begun circulating beams of protons through the Large Hadron Collider (LHC) for the first time since electrical problems 14 months ago halted its use. On Monday, two beams traveling in opposite directions collided, smashing together protons traveling at nearly the speed of light. Scientists at the European Organization for Nuclear Research (CERN) hope the multi-billion dollar collider, which took 20 years to construct, will shed light on the origin of the universe by mimicking the conditions that followed the big bang.