Here Are All of the US Presidents Ranked By Their IQ

Big Head, Big Brain

John Quincy Adams had a notoriously large head, most likely so it could hold his high 175 IQ. That's the highest IQ of any president that has ever lived. John Quincy Adams was a lawyer before and after his presidency, and he helped create the legal systems that we still use to this day. 

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The More You Know

  • Commercial flights were allowed to fly any course to their destination and would often detour over points of interest. This ended in 1956 when two planes crashed mid-flight over the Grand Canyon.
  • In 1945, Dwight D. Eisenhower predicted that people would try to dispel the holocaust as a falsehood, and ordered all possible photographs taken of the Nazi crimes to hinder any such attempts.
  • Tic Tacs got their name from the sound they make.
  • Saint Patrick's Day began as a "feast day". To honor him, Christians could put aside their Lenten restrictions on food and alcohol consumption, which is why excessive drinking has become linked to the celebration.
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