The Carnival of the Animals cello solo (which evokes the swan elegantly gliding over the water) is played over rippling sixteenths in one piano and rolled chords in the other (said to represent the swan's feet, hidden from view beneath the water, propelling it along). A staple of the cello repertoire, this is one of the most well-known movements of the suite, usually in the version for cello with solo piano which was the only publication of this work in Saint-Saëns's lifetime. More than twenty other arrangements of this movement have also been published, with solo instruments ranging from flute to alto saxophone. A short
Moral status of animals in the ancient world attempt the creation of a taxonomical categorization and hierarchy of animals. Aristotle perceived some similarities between humans and other species and developed a sort of "psychological continuum", recognising that human and non-human animals differ only by degree in possessing certain temperaments. Nevertheless, he denied animals rationality and moral equality. "Plants are created for the sake of animals," he wrote, "and animals for the sake of men." Aristotle argued that humans were the “masters” in his created hierarchical structure based upon their rational powers. One of Aristotle's pupils, Theophrastus, argued against eating meat on the grounds that it robbed animals of