Pupil of Socrates, who contributed to the record of his life.
Long article about questions of time discussed throughout the history of philosophy.
4th century BCE philosopher of Abdera who expanded the atomic theory of Leucippus.
Introduction to ethics, with links to other articles at the IEP.
4th century BCE founder of the Greek school of skepticism.
Greek sophist and rhetorician, known as "the Nihilist," born in 483 BCE.