March 9 in Science History: Discoveries, Scientists and Breakthroughs
March 9, 2025
1564 Johannes Fabricius is born on March 9, 1564. The German astronomer later produced some of the earliest telescopic observations of sunspots and helped demonstrate that the Sun rotates, helping overturn older ideas of celestial perfection.
1676 Cotton Mather is born on March 9, 1676. The American minister later promoted smallpox inoculation in colonial Boston after learning of the practice from the Ottoman world, helping reduce mortality during the 1721 epidemic.
1758 Franz Joseph Gall is born on March 9, 1758. The German physician proposed that mental functions were localized in different regions of the brain, initiating early debates and research on brain localization.
1822 On March 9, 1822, the first United States patent for artificial teeth is issued to Charles Graham, marking an early milestone in dental prosthesis technology and the formal recognition of modern dentures.
1845 Wilhelm Pfeffer is born on March 9, 1845. The German botanist later pioneered experimental plant physiology and methods for measuring osmotic pressure in plant cells, laying foundations for modern botany.
1893 On March 9, 1893, James Dewar reports freezing air into a transparent solid, advancing cryogenic science and the study of extremely low temperatures in laboratory conditions.
1900 Howard H. Aiken is born on March 9, 1900. He later developed the Harvard Mark I, one of the earliest electromechanical computers, helping accelerate large-scale scientific calculation.
1923 Walter Kohn is born on March 9, 1923. The physicist later won the Nobel Prize in Chemistry for developing density-functional theory, a breakthrough that transformed computational chemistry and materials science.
1948 On March 9, 1948, researchers at Berkeley announce the artificial production of mesons using a cyclotron, confirming that high-energy particles associated with cosmic phenomena could also be created in the laboratory.
1974 Earl W. Sutherland Jr. dies on March 9, 1974. The Nobel Prize-winning biochemist discovered cyclic AMP, a key messenger molecule in hormone signaling and one of the great breakthroughs of modern biochemistry.
1981 Max Delbrück dies on March 9, 1981. His bacteriophage experiments helped establish molecular genetics and shaped the understanding of heredity at the molecular level.
1983 Ulf von Euler dies on March 9, 1983. The Swedish physiologist discovered noradrenaline as a neurotransmitter and made major contributions to neurophysiology and chemical signaling.
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