About This Video

According to the standard model of particle physics, there are four fundamental forces in the universe: strong nuclear, weak nuclear, electromagnetic, and gravitiational. Each force is carried by it’s own set of bosons: gluons, W and Z bosons, photons, and the theoretical graviton. It has been theorized that all four particles behave the same at high energy levels, making all four forces equal. Nobel laureate Frank Wilczek explains how supersymmetry—or SUSY—could be this ideal “unified theory.”

Recorded June 2010; Posted September 2010