Perpetual motion: Devices that go forever once started, without fuel or maintenance... (Poll Closed)

• defy the laws of physics
  68%
  253 votes
   
• have been demonstrated
  13%
  49 votes
   
• will be possible one day
  16%
  58 votes
   
• are for techies, not real people
  1%
  5 votes
   
• don't interest me
  1%
  5 votes