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- 16:01, May 2, 2009 diff hist +58 Coal added some more info on fm of coal
- 15:57, May 2, 2009 diff hist +100 Geology →Age of the Earth
- 15:56, May 2, 2009 diff hist +52 Coal →Types of coal
- 15:54, May 2, 2009 diff hist +1 Geology →Age of the Earth: another grammatical error!
- 15:54, May 2, 2009 diff hist +195 Coal →Origins
- 15:49, May 2, 2009 diff hist -4 Geology →Age of the Earth: grammatical error don't to do not