Given that human DNA (Deoxyribonucleic Acid) is so similar to other mammals, and given that humans lived pretty much as other animals did until 10,000 years ago, I suspect vanity has made humans exaggerate how much more intelligent they are than other species. Granted there are some clever humans, but the average one survives merely because he lives in a sustaining womb of civilisation that tells him what to do. He has not the sense on his own to even come in out of the rain. Further, we measure intelligence by human goals, e.g. construction and the manipulation of objects rather than the goals of other species such as composition or athletics.
~ Roedy (born: 1948-02-04 age: 64)