The standard model of particle physics is approaching the half-century mark. I shall discuss what we have learned and where we might be headed.

David Gross is the Chancellor's Chair and Professor of Theoretical Physics at the Kavli Institute for Theoretical Physics at UC-Santa Barbara and a Nobel Laureate in Physics, 2004.

Twitter: #PrincetonPHYcolloq

Recording of Prof. Gross's colloquium talk: http://www.kaltura.com/tiny/niroo