Neil deGrasse Tyson appears on “Chicago Tonight.”

The evolving and often parallel relationship between scientific and military minds is the focus of a new book from astrophysicist Neil deGrasse Tyson: “Accessory to War: The Unspoken Alliance Between Astrophysics and the Military.”

Neil deGrasse Tyson joins Chicago Tonight’s Eddie Arruza for an extended conversation about science and our place in the cosmos.