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A lot of things haven't been invented yet, however it is impossible to say how many. Sometimes people think of an invention, however they do not actually invent it so it works, such as the time machine.

Here are some things people have thought of, however they have not been invented in reality:
  • A homework robot
  • A time machine
  • Hovercraft
  • Interactive holograms
  • Superpowers
  • ect...
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14y ago

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