It takes 3 days or less for some food leftovers or even just wet spots on wood in room temperature to start growing a good amount of bacteria all over it, so how is it that like all of the ground and other organic material out in the elements aren’t completely covered in mold and algae after billions of years?
In: Biology
Because other animals exist and environments are a thing.
As you point out, you need wetness in order to grow these things, and the entire world isn’t wet all the time. Mold can’t grow just anywhere, it has to have particular conditions in order to survive. Further, other creatures eat the mold and bacteria and other creatures eat them in turn, and so on.
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