It means that each line is a friendship – and the whole picture pretty much covers the five continents =)
This is made by Paul Butler – an intern on Facebook’s data infrastructure engineering team.
Each line might represent a friendship made while travelling, a family member abroad, or an old college friend pulled away by the various forces of life. When I shared the image with others within Facebook, it resonated with many people. It’s not just a pretty picture, it’s a reaffirmation of the impact we have in connecting people, even across oceans and borders.