I would like to know the origin of the term 'Yellow Journalism'.
The term "yellow journalism" was derived from Robert Outcault's comic strip "The Yellow Kid" around 1895. The battling newspapers, Joseph Pulitzer's New York World and William Randolph Hearst's New York Journal, were both accused of sensationalizing the news. Both also published the Yellow Kid. The term was at first "yellow kid journalism" but was then shortened as "yellow journalism".
More information about the background of the term: