Modern inventions and discoveries in biology?

Anaesthesia

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With the discovery "anaesthesia", people conquered pain. It made some of the most dangerous medical operations to be possible without further hurting the patient. The term was coined by Oliver Wendell Holmes, Sr. in the year 1846. The original definition of this term is "the blockage of sensation" but could also be defined as, "reversible lack of awareness". Actually, anaesthesia was already used in the pre-historic times. Even in the year 4200 B.C., opium poppy was collected to make it as a herbal anesthesia.