Bison have been in the news recently. The Interior Department this past week released $5 million to help fund both bison restoration and grasslands rehabilitation.  And next month Ken Burns and Dayton Duncan will release their latest documentary, The American Buffalo. The American Buffalo documentary traces the history of how bison nearly went extinct, and how they came back. It will be delivered in a two-part, four-hour series on public television. Earlier this summer I talked to Dayton Duncan about the project, and we’re rerunning that conversation to remind you of the documentary that is set to debut on October 16.