Learn about the history of science by reading about the significant scientific events that took place on this day in history.
1926 - Andrew V. Schally was born.Schally is an American endocrinologist who shares half the 1977 Nobel Prize in Medicine with Roger Guilemin for their discoveries about peptide hormone production in the brain. He isolated and synthesized three hormones produced in the hypothalamus region of the brain. These hormones control the activities of other hormone-producing glands in the body.
1915 - Henry Taube was born.Taube was a Canadian-American chemist who was awarded the 1983 Nobel Prize in Chemistry for his work towards the understanding of electron transfer reactions in metal complexes. His work involved inner sphere electron transfers during a redox reaction. He found that during these reactions, a ligand bridges two metal redox centers. He used radioactive isotopes to identify the mechanisms involved in redox reactions.
1889 - Edgar Douglas Adrian was born.Adrian was a British electrophysiologist who shares the 1932 Nobel Prize in Medicine with Charles Scott Sherrington for their research into the functions of neurons. Adrian focused on the electrical signals associated with sensory organs. He also researched the electrical activity of the brain.
1869 - Nils Gustaf Dalén was born.
Dalén was a Swedish industrialist and inventor who was awarded the 1912 Nobel Prize in Physics for his invention of the automatic sun valve. This device regulated a gaslight lamp's fuel through the action of sunlight, turning it on when it was dark, and off again at dawn. It was quickly adopted in ocean buoys and lighthouses. He lost his eyesight while working on one of his other inventions, but managed to continue inventing until his death.
1850 - Germain Henri Hess died.
Hess was a Swiss-Russian chemist who was a pioneer of thermochemistry. He determined the total amount of heat formed by chemical reactions would always be the same no matter how many steps it took to get the desired product. This would become known as Hess's law of summation and was an early step to the conservation of energy law of thermodynamics.
1761 - Smithson Tennant was born.Tennant was an English chemist who discovered the elements iridium and osmium. He discovered these elements while investigating platinum ores. He also showed that diamonds are made of pure carbon.
1756 - Ernst Florens Friedrich Chladni was born.
Chlandi was a German physicist best known for his research into sound. He developed a method to illustrate standing waves on a surface using a bow and sand. He also determined the speed of sound in many different gasses. Another of his interests involved meteorites. He was the first to suggest meteorites originate in outer space rather than from a volcanic source, the idea of the time.