In the early carboniferous you have a hot, wet planet with lots of tectonic activity in the warm temperate and tropic regions, forming these giant sinking basins for peat forests to form and gradually get buried. These conditions produced a lot of coal, lignin-eating-fungus or no.
Redoing w/ my most recent results doing the exhaustive version of the Open-Source Psychometrics Project
These four have been consistently in my top every time I take it.
