Books VIII-X: How various species of animals feed, migrate, and nest. Diseases. Differences of animals by region. Character of animals. Which animals are enemies with each other. Observations on human development. Aristotle, son of the physician Nicomachus, was born in Stagira in 384 BC. Information about the early years of his life is scarce. At the age of seventeen, he went to Athens to study at the Platonic Academy. He stayed there for twenty years, from 367 to 348 BC, when Plato died. Then Aristotle left for Assos in the Troad and after a three-year stay there, he went to Lesbos and then to Macedonia, where he undertook the education of the royal child Alexander. When his student ascended the throne, Aristotle settled in Athens and founded his school, the Lyceum. After the death of Alexander (323 BC), the philosopher's stay in Athens became difficult. He was forced to take refuge in Chalcis, his mother's homeland, where he died in 322. A universal spirit, Aristotle created a vast and valuable philosophical and scientific work. Epistemology, logic, theology, physics, biology, psychology, ethics, political philosophy, aesthetics are the main cognitive fields he researched and studied. The Alexandrian Hermippus estimated Aristotle's works at 400. Catalogs that have survived to us include 143 titles of his works. Diogenes Laertius estimated the number of lines of Aristotelian writings at 440,000. The influence of his work on the formation of global thought was strong for centuries and remains so. [Excerpt from publisher or edition presentation text]