Book K: Continuation of observations regarding the functions of living beings. Specifically: Problems of conception and reproduction.

Aristotle, the son of the physician Nicomachus, was born in Stagira in 384 B.C. Information about his early years is scarce. At the age of seventeen, he went to Athens to study at the Platonic Academy. He remained there for twenty years, from 367 to 348 B.C., when Plato died. Then Aristotle left for Assos in Troas, and after a three-year stay there, he went to Lesbos and subsequently to Macedonia, where he took on the education of the royal offspring Alexander.

When his student ascended the throne, Aristotle settled in Athens and founded his school, the Lyceum. After the death of Alexander (323 B.C.), the philosopher's stay in Athens became difficult. He was forced to flee to Chalcis, his mother's homeland, where he died in 322.

A universal mind, Aristotle created a vast and valuable philosophical and scientific body of work. Epistemology, logic, theology, physics, biology, psychology, ethics, political philosophy, aesthetics are the main fields of knowledge he researched and studied.

The Alexandrian Hermippus estimated Aristotle's works to number 400. To this day, lists including 143 titles of his works have survived. Diogenes Laertius estimated the number of lines in Aristotle's writings to be 440,000. The impact of his work on the formation of global thought was, for centuries, and remains, strong.

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