Esther Sternberg will talk about “How Our Surroundings Influence Happiness and Health” in the third in a series of five lectures on happiness. The lecture is at 6:30 p.m. today at the Fox Theatre, 17 W. Congress St.

Sternberg is professor of medicine and research director at the Arizona Center for Integrative Medicine at the University of Arizona. In her lecture, she will show how our physical environment can affect emotions and how structuring one’s environment can change emotions and health.

Tickets to the lecture are free and are available beginning at 11 a.m. at the Fox Theatre box office. A ticket is required for entry and doors open at 5:30 p.m. Be aware that the theater fills up early.

Overflow seating is available at the Unisource Building, 88 E. Broadway, where the lecture will be streamed live on a large screen.

Those who have questions after the lecture may join a live online chat with Sternberg at noon Friday. Questions may be submitted at at any time after the lecture. They will appear as they are answered during the live chat.

Future lectures, also at Fox Theatre, are the next two Wednesdays.

On Nov. 6, David Raichlen, School of Anthropology, will talk about “The Evolutionary Links between Exercise and Happiness.”

On Nov. 13, Daniel C. Russell, Center for the Philosophy of Freedom, will discuss “Happiness — A Feeling or a Future?”