The above lists a summary of the Buddha’s cosmology. All are closely interdependent as beings progress through the various realms of existence. In addition to the six major levels of the planes of existence listed above, there are 16 planes of heavenly beings outside the sense world (the world of Form) and another 4 planes of heavenly beings in the Formless world (without body) for a total of 31 planes of existence. In the planes of existence we can see our close connection to animals. This is from the re-birth process and the fact that animals, like humans suffer from emotions, selfish cravings, and other pleasant and unpleasant sensations. Darwin’s theory of evolution is completely compatible with Buddhism.