Anaximenes of Miletus (/ˌænækˈsɪməˌniːz/; Greek: Ἀναξιμένης ὁ Μιλήσιος; c. 586 – c. 526 BC) was an Ancient Greek, Ionian Pre-Socratic philosopher from Miletus in Asia Minor (modern-day Turkey), active in the latter half of the 6th century BC. The details of his life are obscure because none of his work has been preserved. Anaximenes' ideas are only known today because of comments about him made by later writers, such as Aristotle.