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November 22 Science History

Science History of November 22

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Learn about the history of science by reading about the significant scientific events that took place on this day in history.

1981 - Hans Adolf Krebs died.

Krebs was a German biochemist who was awarded half the 1953 Nobel Prize in Medicine for his discovery of the citric acid cycle. The citric acid cycle, or Krebs cycle is a series of chemical reactions in the cell that breaks down food molecules into carbon dioxide, water, and energy. He also discovered the urea cycle where urea is produced from ammonia in the liver.

1917 - Andrew Fielding Huxley was born.

Huxley is an English physiologist who shares the 1963 Nobel Prize in Medicine with John Carew Eccles and Alan Hodgkin for their discoveries and research involving nerve cells. Huxley and Hodgkin's research involved nerve action potentials. These are the electrical signals that enable a nerve's coordination with the central nervous system. They hypothesized the existence of ion channels that transport the actual nerve signal that would be discovered in the 1970s.

1907 - Asaph Hall III died.

Asaph Hall (1829 - 1907)
US Navy
Hall was an American astronomer who discovered the two moons of Mars, Phobos and Deimos. He worked for the US Naval Observatory and determined the orbits of several planet's satellites and the rotation rate of Saturn.

1904 - Louis-Eugène-Félix Néel was born.

Néel was a French physicist who was awarded half the 1970 Nobel Prize in Physics for his discoveries concerning ferromagnetism and antiferromagnetism and contributions to solid state physics. He researched magnetism on the molecular level and found the electrons in ferromagnetic materials tend to spin in all the same directions. In non-magnetic material, side by side electrons will spin in opposite directions and cancel each other's magnetic field out. He called this property antiferromagnetism.

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