If you experience any technical difficulties with this video or would like to make an accessibility-related request, please send a message to [email protected]. Last summer, scientists at the Large Hadron Collider in Geneva, Switzerland, announced the discovery of a new particle that could explain why elementary particles have mass. On February 7, 2013, a panel of experts from the University of Chicago, Argonne National Laboratory, and Fermilab discussed why this discovery marks the beginning of a new era in particle physics research.