1. We learned that animals may make choices based on aesthetics.
3. 2013 Rank: 12
4. Uruguay owes much of its success not just to its passion for football but also to the early inclusiveness of its culture. In that 1950 tournament, at a time when neighboring Brazil still regarded its black players with suspicion, Uruguay boasted a black captain, the brilliant Obdulio Varela. Moreover, Uruguay's victories in the World Cup's formative years established a pedigree that endures to this day, with many of its footballers -- such as Liverpool's Luis Suárez and Paris Saint-Germain's Edinson Cavani -- playing abroad for some of the world's biggest clubs.