View full lesson: http://ed.ted.com/lessons/how-false-news-can-spread-noah-tavlin

In previous decades, most news with global reach came from several major newspapers and networks with the resources to gather information directly. The speed with which information spreads now, however, has created the ideal conditions for something called circular reporting. Noah Tavlin sheds light on this phenomenon.

Lesson by Noah Tavlin, animation by Patrick Smith.