To prevent early signs of Alzheimer I guess?
I used to be quite ignorant about World War 2 aircrafts, let alone which one is Bf109 and which one is Yak-1. But now I was able to tell which is Spitfire Mk.I, Mk.V, or Mk.IX, it suddenly got into me somehow and quite nice to know. Games do help me a lot doing this. I memorised world map, thanks to Microsoft Flight Simulator and all its add-on glories. It does help to know that there are many places around the world named Sydney, London, Melbourne, and so on, makes me less nervous seeing the news.
Next: African tribes and languages, have no idea which one or what is Xhosa, Bantu, Tutsi, Swahili, Ashanti, and so on. Science says, their genes are much more diverse than let's say, the old world and new world people. So, Kenyans are genetically much different from Ugandans, than between the Russian and French people, for instance. Even than Swedish and Vietnamese people, or the Jews and Germans, which makes it kind of interesting. But on the surface, all we see is "black people", "black continent", and that kind of labeling.