A treatise focused on the study of phenomena that occur in the area from the center of the earth to the sphere of the moon. Issues of astronomy, geography, physics, geometry, optics, geology, seismology, volcanology, and meteorology are examined. Books A, B: The air, fire, comets, the galaxy, Earth's humidity, the sea, earthquakes.

Aristotle, son of the physician Nichomachus, was born in Stagira in 384 BC. Information is very limited regarding the early years of his life. 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 Troas and after a three-year stay there went to Lesbos and subsequently to Macedonia, where he took on the education of the royal child Alexander.

When his student ascended to 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 flee to 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 fields of knowledge that he researched and studied. The Alexandrian Hermippus estimated Aristotle’s works to number 400. To this day, lists have survived that include 143 titles of his works. Diogenes Laertius estimated the number of lines in Aristotelian writings at 440,000. The influence of his work on the formation of global thought was, for centuries, and remains, strong.

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