To download a PDF of the puzzle, click here.

Presented as part of the Quad City Engineering and Science Council's “Teacher's Night Out Series,” the first episode of Ken Burns' new documentary series The Gene: An Intimate History will be screened at the Blue Grass Drive-in on September 17 – a free event co-hosted by the Quad Cities' PBS station WQPT-TV, and the introduction to an acclaimed four-hour work that the U.K.'s The Telegraph awarded four stars and called “serious-minded, informative, and knowledgeable.”

To download a PDF of the puzzle, click here.

To download a PDF of the puzzle, click here.