The Most Outrageous U.S. Conspiracy Theories

Humming from the Sky

Some people have tried to say that airplanes are the cause of humming. That theory has not been proven. Others think that it's something extraterrestrial or secret government training. The government has not commented on what the sound was.

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The More You Know

  • Video games help surgeons perform better.
  • Roughly 600 Parisians work at the Eiffel Tower each day.
  • Baby elephants suck their trunks for comfort.
  • The stars and flashes of light you see when you rub your eyes are called "phosphenes."
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