"TIL in Shanghai every weekend there is a marriage market, parents and grandparents of unmarried adults gather in a park and trade information on their children/grandchildren (height, weight, income, occupation...) with the goal to find them a suitable partner"

"TIL There are more than 300 types of headaches, but only about 10% of headaches have a known cause. The brain tissue and the skull are never responsible since they don't have nerves that register pain"

"TIL during the filming of The Outlaw Josey Wales, Clint Eastwood persuaded the producer to fire the director and Eastwood took over the role. In response, the Directors Guild of America created the Eastwood Rule prohibiting an actor or producer from firing the director and then becoming director."

"TIL Lincoln made no mention of Pilgrims, Plymouth or Natives when he codified Thanksgiving as a national holiday."