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| main_interests = | notable_ideas = | influences = | influenced = }} Thales of Miletus (; (ギリシア語:Θαλῆς (ὁ Μιλήσιος)), ''Thalēs''; 624 – c. 546 BC) was a pre-Socratic Greek philosopher and mathematician from Miletus in Asia Minor and one of the Seven Sages of Greece. Many, most notably Aristotle, regard him as the first philosopher in the Greek tradition.〔Aristotle, Metaphysics Alpha, 983b18.〕 Aristotle reported Thales' hypothesis that the originating principle of nature and the nature of matter was a single material substance: water. Thales attempted to explain natural phenomena without reference to mythology. Almost all of the other Pre-Socratic philosophers follow him in attempting to provide an explanation of ultimate substance, change, and the existence of the world without reference to mythology. In mathematics, Thales used geometry to calculate the heights of pyramids and the distance of ships from the shore. He is the first known individual to use deductive reasoning applied to geometry, by deriving four corollaries to Thales' Theorem. He is the first known individual to whom a mathematical discovery has been attributed. == Life == The current historical consensus is that Thales was born in the city of Miletus around the mid 620s BC. Miletus was an ancient Greek Ionian city on the western coast of Asia Minor (in what is today Aydin Province of Turkey), near the mouth of the Maeander River. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Thales」の詳細全文を読む スポンサード リンク
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