What is the fine-grained topic of the following text: BUFFALO, N.Y. -- Baruch S. Blumberg, M.D., Ph.D., winner of the 1976 Nobel Prize in Medicine for discovery of the hepatitis B virus (HBV), will present a talk on "The Adventure of Science and Discovery," April 16 at 5 p.m. in Butler Auditorium in Farber Hall on the University at Buffalo's South (Main Street) Campus. Only return the topic.
Baruch S. Blumberg's presentation on "The Adventure of Science and Discovery" at University at Buffalo