4.Louis Pasture(1822-1895)A.D
He is the man who made a great contribution in the field of science,technology and medicine.Louis Pasture was born in 1822.He spent his whole life contributing towards chemistry and biology.
The first man to study about fermentation in food elements caused by microbes was not other than pasture.He purposed theory named "germ theory" and explained about the bio-genesis.He also invented the method of pasteurization which helped in purifying the milk from damage causing microbes.He also discovered the cure for "purple fever" and he was the first man to do it on the earth.He discovered the vaccines for rabies and anthrax.The height of accomplishments and discoveries in many fields makes him a great genius.he died in 1895.