What makes someone share a story on Facebook? If the original post comes from a celebrity such as George Takei, maybe it was a funny post. If it comes from a close friend, maybe it’s an announcement. If it’s from a high school classmate they haven’t spoken to in years, maybe it’s something thought-provoking. Dean Eckles, a member of the data science team at Facebook, spoke at Tahoe Snowcial in Nevada about how the connection between users influences how they share on the social network.