News Finding: The spread of fake news by social bots 
Paper Finding: Relatively few accounts are responsible for a large share of the traffic that carries misinformation.
News Context: The spread of fake news by social bots 
Paper Context: Our analysis provides quantitative empirical evidence of the key role played by social bots in the viral spread of fake news online. Relatively few accounts are responsible for a large share of the traffic that carries misinformation. These accounts are likely bots, and we uncovered several manipulation strategies they use.