
The world the Polywog inhabit was much like our own world until very recently. A meteor entered the worlds atmosphere and was believed to have burned up on entry. That was not the case however. A small, but extremely radioactive meteorite landed in a small pond and began to have extreme affects on the creatures living within it. The amphibians were the most susceptible due to their ability to go through metamorphic changes. Which explains why they can evolve and change so rapidly.