Simplify the following text for a Grade 15 native English-speaking person.
Original: Pedogenesis is the major topic of the science of pedology , whose other aspects include the soil morphology , classification ( taxonomy ) of soils , and their distribution in nature , present and past ( soil geography and paleopedology ) .
Simplified: It is the major topic of the science of pedology , whose other aspects include the soil morphology , classification ( taxonomy ) of soils , and their distribution in nature , present and past ( soil geography and paleopedology ) .