View full lesson: http://ed.ted.com/lessons/what-facebook-and-t he-flu-have-in-common-marc-sametFrom social media to massive financial institutions, we live within a web of networks. But how do they work? How does Googling a single word provide millions of results? Marc Samet investigates how these networks keep us connected and how they remain "alive."Lesson by Marc Samet, animation by Thinkmore Studios.