Some Theories of Brain and Mind

In comparison with other animals, human beings are relatively slow and ineffective. Our physical strength and general performance fall far below that of animals of our own size. The human life-span is also short when compared with such different animals as the elephant or the Galápagos tortoise which limits the amount of human accumulated experience. We cannot remain in water for a long time, or fly; our body can only survive within a very limited internal and external temperature range and we must have oxygen to breathe.