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First to find the formula for the volume of a sphere and cylinder

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First to find the formula for the volume of a sphere and cylinder

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Found hydrostatic principle or the Archimedes principle

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Found hydrostatic principle or the Archimedes principle

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Invented a water raising device still used today.

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Invented a water raising device still used today.

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First to calculate an accurate estimate of pi

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First to calculate an accurate estimate of pi

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He was a popular politician and a general in Athens.

He monitored and helped rebuild the monumental buildings atop the Acropolis.

When he was a general he helped come up with defensive strategies during the Peloponnesian war.

He was a large role in developing democracy in Athens

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Democritus invented the atomic theory. It is the fact that everything is made of tiny invisible particles called atoms.

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Unfortunatly, Aristote rejected his idea in On Generation and Corruption

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Although he also studied that a cone or pyramid have one third of the volume of a cylinder or prism

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Thales of Miletus, (born c. 624–620 BCE—died c. 548–545 BCE), philosopher renowned as one of the legendary Seven Wise Men, or Sophoi, of antiquity. He is remembered primarily for his cosmology based on water as the essence of all matter, with Earth a flat disk floating on a vast sea. The Greek historian Diogenes Laërtius (flourished 3rd century CE), quoting Apollodorus of Athens (flourished 140 BCE), placed the birth of Thales during the 35th Olympiad (apparently a transcription error; it should read the 39th Olympiad, c. 624 BCE) and his death in the 58th Olympiad (548–545 BCE) at the age of 78 (see philosophy, Western: The pre-Socratic philosophers).