1921 in science
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See also:
Other events of 1921
List of years in science
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1920 in science
1921 in science
1922 in science
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The year 1921 in science and technology included many events, some of which are listed here.
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Chemistry
- Thomas Midgley discovers the effective anti-knocking properties of Tetra-ethyl lead, which is used in "leaded" gasoline (petrol).
Medicine
- July 18 - The first BCG vaccination against tuberculosis.
- July 27 - Researchers at the University of Toronto led by biochemist Frederick Banting announce the discovery of the hormone insulin.
Physics
- T. Kaluza demonstrates that a five-dimensional version of Albert Einstein's equations unifies gravitation and electromagnetism.
Awards
- Nobel Prize
- Physics - Albert Einstein
- Chemistry - Frederick Soddy
- Physiology or Medicine - not awarded
Births
- May 21 - Andrei Sakharov (d. 1989), physicist, human rights activist, Nobel Laurette in Peace
Deaths
- March 29 - John Burroughs (b. 1837), naturalist.
- October 23 - John Boyd Dunlop (b. 1840), inventor.