Shock, bemusement, sorrow, anger-these are some of the looks on the faces in the photographs in Sebastiao Salgado's Migrations. A resident of Paris for the last thirty years, Sebastiao Salgado moves around the world from Bombay to Chimborazo. In conjunction with the universal aspects of the exhibit called Migrations in the University Art Museum at UC Berkeley, the Avenali Lecture asks of a project including forty countries on five continents: in what ways does the Earth on whose basic unity Sebastiao Salgado so forcefully insists interface with the "terra" which in Portuguese also means one's native land?