From one of the most important articles on Wikipedia:

  • the most surprising one is that microwaves do not work by emitting waves at resonance frequency of water; they work using some other method
  • the Great Wall of China is not visible from space (unaided)
  • seasons are not caused by the Earth being closer to the Sun in the summer than in the winter
  • we are not born with all brain cells we will ever have; this is a recent discovery (2000s)
  • Frankenstein was actually the name of the creator of the monster, not the monster itself
  • Thomas Edison did not invent the light bulb