Favorite obsolete scientific theory

With the procession of science, some theories have been superseded or disproved.  What's your favorite obsolete theory?


Phlogiston theory - Wikipedia, the free encyclopedia


Flat Earth - Wikipedia, the free encyclopedia


Aether theories - Wikipedia, the free encyclopedia


Geocentric model - Wikipedia, the free encyclopedia

Poll Results
  • Phlogiston (9%)
  • Flat Earth (57%)
  • Aether (Various) (9%)
  • Geocentrism (16%)
  • Other - please leave a comment (10%)


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