Jason Colby is an associate professor of environmental and international history at the University of Victoria. His new book is “Orca: How We Came to Know and Love the Ocean's Greatest Predator.” It chronicles the history of human fascination with orcas and the prospects for their survival. Colby has a personal link to that history. His father helped capture and sell orcasa. Jason Colby spoke at University Lutheran Church on June 5. Town Hall Seattle presented his talk, recorded by KUOW’s Sonya Harris.