How one Tumblr post got propagated. By Ron Barak
Update: a week ago I posted a George Carlin quote that became quite popular (391 notes at last count).
The directed graph above is answering the (interesting) question of how that post was propagated: one apparent thing is that the main drivers of the post’s popularity are very few: only one on the 3rd level and one on the 6th level.
The graph was created with Python 2.6 and graphviz (altgraph.Dot library).