Scientists at CERN are slamming protons together at an unprecedented energy level in order to unlock our world's most enduring mysteries - including dark matter, which we know little about despite it accounting for 26.8 percent of all mass and energy. The Large Hadron Collider (LHC), which restarted for its third run after undergoing extensive upgrades, shattered energy records when it was turned back on today - enabling physicists to further study the Higgs Boson and what this particle's decay can reveal about the rest of the universe. By colliding proton beams together at 13.6 teraelectronvolts, the LHC broke a record; to give a sense of the power being unleashed at the particle collider located 300 feet underground, one tera electron volt is equivalent to 1,000,000,000,000 electron volts. CERN physicist Katharine Leney, pictured above, works at the ATLAS Experiment and is an assistant research professor at Southern Methodist University in Dallas, Texas. 'We think [dark matter] has mass but we don't know anything about it,' CERN physicist Katharine Leney, who works on the ATLAS Experiment and is a research assistant professor at Southern Methodist University in Dallas, Texas, told Daily Mail in an interview.