Archimedes

Archimedes of Syracuse (287 BC – 212 BC) was a Greek physicist, engineer, astronomer, mathematician, and inventor. While he is known as one of the great mathematicians of history (he derived an accurate approximation of pi – i.e. the ratio of a circle’s circumference to its diameter, which is approximately equal to 3.14159) the man is also a legendary scientist, contributing to a true array of disciplines, with his achievements including explaining the laws of levers and pulleys. Knowledge which was utilised in the development of innovative defensive war machines to protect his native Syracuse.