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  #18  
Old July 12, 2012, 04:39 AM
El Gato El Gato is offline
Opal
 
Join Date: Jul 2012
Posts: 27
Native Language: US English
El Gato is on a distinguished road
Some suggestions I have are:

Astronomy

Physics

Land features (mountains, valleys, rivers etc.)

Food (possibly different types of food having topics of their own)

Technology


The Elements

Plants (tree, bush, grass, etc)
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