Intelligence often doesn’t have anything to do with rationality. There is a marked difference between the two, although we often conflate them. Here, a tightrope walker performs on a rope above the Old Harbour, with the Notre Dame de la Garde basilica in the background, during a sport event as part of Marseille's nomination as 2017 European Capital of Sport in Marseille, France, Sept. 8, 2017. 


Jean-Paul Pelissier/Reuters