c. 2600s BC - Imhotep wrote texts describing diagnosis and treatment of 200 diseases in 3rd dynasty Egypt.
c. 1500s BC - Saffron used as a medicine on the Aegean island of Thera in ancient Greece
c. 500 BC¹ - Sushruta wrote Sushruta Samhita describing over 120 surgical instruments, 300 surgical procedures and classified human surgery in 8 categories. Performed cosmetic surgery
420 BC - Hippocrates begins the scientific study of medicine by maintaining that diseases have natural causes and puts forth the Hippocratic Oath, marking the birth of modern medicine