Many people believe that the lunar calendar in 3500-3000B.C. is the infancy stage of science. Science grew larger with the invention of multiplication tables in 3000-2500B.C. and in 2500-2000B.C. there was a superior lucar calendar in use in Babylon then the simple taxonomies for animal classification began in 2000-1500B.C. there were chemicals for making paints and cosmetics in 1500-1000B.C.

The concept of Infinity was introduced in cosmology by Anaximander(611-547)B.C. which believed that life evolved from the sea; and the notion that the world is a sphere was of Pythagoras(580-500)B.C. who also formulated the basic laws of geometry in 1000-500B.C. Empedocles of Agrigentum(490-430B.C.) believed there are four elements: earth, water, Fire and air in the 500-400B.C. and in 400-300B.C. the first fully comprehensive cosmology to give a rational account of all physical phenomena was devised by Aristotle(382-322B.C.)

The invention of lever and the Archimedean screen for raising water was introduced by Archimedes of Syracuse(287-212) in the era (300-200B.C.) and in (200-100B.C.) the most accurate ancient star catal
ogue was constructed by Hipparachus of Nicaea(190-129B.C.) he also discovered the precession of equinoxes.

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