Alex Messenger is a photographer, author, and marketer. He is best known for having survived a grizzly beat attack while hiking at age seventeen. After the bear attack, Messenger worked as a wilderness guide and volunteer search-and-rescue operator. Messenger's work has appeared in the New York Times, Men’s Journal, National Parks magazine, Outside, and Backpacker. His memoir, "The Twenty-Ninth Day: Surviving a Grizzly Attack in the Canadian Tundra," was published in 2019.