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I've found a gripping article the other day about researchers who had examined the network system of the Greek epic poem The Odyssey, mapping 1700 connections of 342 characters. Interestingly enough, they have found that the network system of the epos is very similar to that of the network systems of Facebook or Twitter
There is an entertaining (and extremely addictive) game based on Google Street View called GeoGuessr. Our task is simple: we are dropped off somewhere in the world, at random, and we must guess on the world map in the top-right corner where we think that place could be.