Beth Nissen is a veteran news, war/conflict, science, and arts correspondent who has worked in network television (ABC News “World News Tonight” and “Nightline”), cable news (CNN “NewsNight”), public television (WGBH “Nova Science Now”), online (CNN.com, NBCLearn.com), and in print media (The Wall Street Journal, Newsweek).  She is a co-founder and Senior Producer (retired) of NBC Learn, the education division of NBC News. Nissen is at work on a book, On Edge: A History of the Knife.