This thread contains all past ideas for the Theme of the Week. Ideas submitted by members in the PotW Theme Ideas thread will be copied here, and any ideas created by a moderator if there were no other community submitted ideas will also be tracked here. Please check this list FIRST before submitting a theme idea.


The Classical Elements

This would be a four-week series, with one each for

  • Earth
  • Air
  • Water
  • Fire

(I made this one proposal rather than four as it would be nice to see them run all in a row..)

Originally proposed by: mattdm
Ran on: March 5, 12, 19, 26



Any subject that is related to science, or the study of science.


  • Refracting light
  • Scientific instruments
  • Fluids
  • Astrophotography
  • Magnetism
  • Chemical reactions
  • Biological processes

Originally proposed by: maynard-case Ran on: Aug 6

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