part Introduction -- Chemistry in the 20th century, having inherited the advances of the two previous centuries, was first distin- guished by the synthesis of several compounds that are vital to industry, such as nitric acid, ammonia, and methanol. Then came the chemistry of phosphates and synthetic fertilizers, -- chapter Louis Pasteur The French microbiologist postulated that nature has a chiral asymmetry. -- part Max K. Planck -- chapter Albert Einstein -- chapter MORDIALRIP -- chapter Introduction -- The progress in biology and medicine due to the laureates in science and to many other scientists spans essentially three periods. The first was marked by the flourishing development of bacteriology, which began towards the end of the 19th century thanks to Louis Pasteur, Robert Koch, Paul -- chapter This oil on canvas, measuring 7m2, represents the cellular elements that come into play in a reflex arc. The trajectory of the nerve influx goes from a sensory receptor in the skin to a neuromuscular junction. This painting took 18 months to complete. (See Sherrington). -- part Bibliography: Chemistry -- chapter Bibliography: Physics -- chapter - Photo Credits.