(PhysOrg.com) -- Marketers dream of finding ways to get something to "go viral" on the Internet. Indeed, viral marketing, whether it be through email, YouTube, Facebook or Twitter, has become the Holy Grail of online marketing campaigns. With viral marketing, it is possible for the message to reach millions in a matter of hours. Marketers and scientists alike have been studying this phenomenon in the hopes that it will yield information about human dynamics. “There has been a lot of research done on social networks,” Esteban Moro tells PhysOrg.com. “However, until now it has been rare to get feedback from...