7 Infamous Sibling Rivalries At Work

One of Mark Zuckerberg's younger sisters, Arielle, recently launched a career in the tech world, at the advertising startup Wildfire. On Tuesday, Google announced it would be acquiring Wildfire, which means the two Zucks will be on either side of the greatest tech war of the 2010s. Randi, the eldest Zuckerberg tweeted:

The battle between the No. 1 and No. 2 most popular sites on the internet has been tense at times. Like when Facebook tried to take on Gmail with its email service. Or when Google tried to take on Facebook with its own social network. Or when Google blocked users from importing their Gmail contacts to Facebook. Or when Facebook blocked users from importing their contacts to Google+. Meowww!