Aristotle was an ancient Greek philosopher, scientist, and thinker who lived from 384-322 BC. He studied under Plato at his Academy in Athens before going on to establish his own school, the Lyceum. Aristotle is known for his contributions to a wide range of subjects, including ethics, politics, metaphysics, and biology. He is considered one of the most important figures in Western philosophy and his works have had a lasting influence on the fields of science, logic, and ethics. Aristotle's ideas and theories continue to be studied and debated by scholars and philosophers to this day.