LAWRENCE, Kan. (AP) — A conference at the University of Kansas this weekend will explore the ways science fiction and reality often overlap.

Science fiction writers will be attending the Campbell Conference in Lawrence Friday through Sunday. It’s the 35th year of the event. This year’s program will honor the work of Frederik Pohl, who died in September 2013. He was a writer, editor, literary agent and scholar of science fiction.

The Lawrence Journal-World reports a theme of this year’s conference will be the relationship between science fact and fiction.

James Gunn, founder of the University of Kansas’ Gunn Center for the Study of Science Fiction, says science fiction studies how change can affect humans in the future, and how the choices people today make will influence the future.