On Earth, there are far more insects by biomass than any other creature type. Not only that, but they constitute a wider variety of species too. As a result, they also evolve interesting mechanisms unique from animals. That is, it is easier and more common for insects to be bioluminescent compared to large animals. If I wanted to create a planet that favored larger species and possibly non-insectoid species, how would I go about that? Would increased oxygen favor large animals? Or is it the type of biome that matters?
- Insects are NOT the largest by total biomass
- It is more efficient, possible, likely to be cat-sized than cockroach-sized
- Solution must be chemical, biological, or environmental in nature (no planetary changes outside of Earth's current systems)
- The planet must still be habitable for humans (non-advanced special equipment like fur coats is acceptable)
- The solution benefits non-insectoid species (fuzzy animals are more common)
- Does not involve "cuz evolution" (preferably a physical phenomena that causes the larger creatures, avoiding the claim that with evolution anything can happen)