Are we on the verge of another mass extinction? The last one was when the dinosaurs stopped roaming the earth, and now scientists fear we’re beginning to experience another one. And that is the subject of a Pulitzer-Prize winning book by Elizabeth Kolbert entitled, “The Sixth Extinction.” In the book, Kolbert presents scientists’ research across flora and fauna and their finding that many of the extinctions we are seeing now were triggered by human activity.