Quickly, what is antimatter and why does it matter?

If you don't know the answers, but maybe care to find out, the place to be is the Eugene Public Library, at the corner of 10th Avenue and Olive Street, on Wednesday, July 15.

From 6 p.m. to 7:30 p.m., physicist James Brau, a Philip H. Knight Professor and director of the UO Center for High Energy Physics, will address the topic in a presentation geared for a broad audience, including young adults. Admission is free.

Brau, who leads the UO's participation at the Large Hadron Collider in Europe, will detail how antimatter was discovered and its role in the early universe. He'll also discuss the search to find it in cosmic rays and thunderstorms, and its potential applications in physics and even medicine.

In advance of his talk at the library, Brau was interviewed Tuesday morning on the Jefferson Exchange on Jefferson Public Radio.