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0078 – Zhang Heng – bio

Born in 78 in the province of Yuzhou (now known as Henan) of the Han dynasty in China, Zhang Heng was known as a scientist, mathematician, engineer, astronomer, painter and more. He became the chief astrologer to the emperor, An-Ti. He created a rotating globe that was a map of the sky and constellations. He […]

-0287 – Archimedes – bio

Archimedes was a Greek engineer, inventor, mathematician and scientist born in Syracuse, Sicily around -287. He explained how the lever works, invented the “Archimedes screw” pump, and designed many military machines for attack and siege. He discovered how buoyancy in water works by displacement and this is now known as Archimedes Principle. He invented a […]