Archimedes

Archimedes of Syracuse (c. 287–212 BCE) was a Greek mathematician, physicist, engineer and inventor who lived in the ancient city of Syracuse, in Sicily. He made important contributions to geometry, mechanics and the study of floating bodies. In mathematics, he developed methods for calculating areas and volumes and used geometric reasoning to obtain increasingly accurate approximations of π, the ratio between a circle’s circumference and its diameter.

In mechanics, he studied levers, centers of gravity and the behavior of objects in water. The principle named after him states that an object immersed in a fluid experiences an upward force equal to the weight of the fluid it displaces. This idea helps explain why some objects float while others sink. Many stories about Archimedes come from much later sources, so not every famous anecdote about his life can be confirmed.

Archimedes also designed practical machines, including systems of pulleys and devices for lifting heavy loads. He is traditionally associated with the Archimedean screw, a mechanism that can raise water using a rotating helical surface, although its exact origin is uncertain. During the Roman siege of Syracuse, ancient accounts describe defensive machines attributed to him, but the details are difficult to verify.

Archimedes was killed in 212 BCE when Roman forces captured Syracuse during the Second Punic War. His writings continued to influence mathematics and science for centuries. He is remembered not simply for a collection of inventions, but for showing how mathematical reasoning could be used to understand physical phenomena and solve practical problems.