Branes and Gauge Theory Dynamics Amihay Hanany MIT Center for Theoretical Physics There are many types of extended objects in string theory which go under the name "branes". Thus, a pointlike object is a zero brane, a string is a one brane, a membrane is a two brane, etc. Branes have life of their own, and a quantum theory which describes their dynamics. Gauge fields live on them, similar to the gauge fields of the standard model of particle physics. These are fields like the electromagnetic field, the gluon field, and the W & Z gauge fields. There are also charged matter fields which have properties like the electrons, the quarks and the leptons. In a superstring theory the supersymmetry greatly simplifies the gauge dynamics, enabling us to understand better the dynamics of the brane gauge theories. The new insights offer a radically new perspective over the behavior of gravity in various dimensions: the world as seen from the eyes of a brane observer. In this talk we will get a glimpse to the wonderful world of branes. (intended for a broad non-specialist audience)