Twitter communications span the globe and the pinpointing of end locations of conversations in this animation shows how the network spans around the planet. It jumps between the hot spots of cities and even continents.
In the description of the project the authors discuss the rather interesting point of the meaning of 'Location in the case of twitter. In fact this not only applies to twitter but many location based services, the here is not always here. "'Location' has 2 meanings in the world of Twitter. It can mean (1) where someone was when they tweeted provided they are using a GPS-enabled smartphone, or (2) where someone lives (users can specify their home location)." (Geography 970)
In a second version the locations were mapped on a rotating globe which give a good impressionof how we communicate around an axis. For details please see Geography 970.