He's called André Pannison, and he basically took the Twitter conversation in Tahrir Square on the day that Hosni Mubarak would eventually resign, and the dots you can see are retweets, so when someone retweets a message, a connection is made between two dots, and the more times that message is retweeted by other people, the more you get to see these nodes, these connections being made.
Han hedder André Pannison, og han tog dybest set Twitter samtalen på Tahrirpladsen den dag som Hosni Mubarak i sidste ende trådte tilbage, og prikkerne man kan se er retweets, så når nogen retweeter en besked, kommer der en forbindelse mellem to prikker, og jo flere gange en besked bliver retweetet af andre mennesker, jo mere kommer man til se disse knudepunkter, disse forbindelser blive lavet.