- 1921 in science
The year 1921 in
science andtechnology involved some significant events, listed below.Chemistry
*
Thomas Midgley discovers the effective anti-knocking properties ofTetra-ethyl lead , which is used in "leaded"gasoline (petrol).Medicine
*
July 18 - The first BCG vaccination againsttuberculosis .
*July 27 - Researchers at theUniversity of Toronto led by biochemistFrederick Banting announce the discovery of thehormone insulin .Physics
*
T. Kaluza demonstrates that a five-dimensional version ofAlbert Einstein 's equations unifiesgravitation andelectromagnetism .Awards
*
Nobel Prize
** Physics -Albert Einstein
** Chemistry -Frederick Soddy
** Physiology or Medicine - not awardedBirths
*
May 21 -Andrei Sakharov (d.1989 ),physicist , human rights activist, Nobel Laurette in Peace
*July 15 - Bruce Merrifield (d. 2006), Nobelaureate inChemistry (1984 ) for developing a rapid, automated system for makingpeptide s.Deaths
*
March 29 -John Burroughs (b. 1837), naturalist.
*October 23 -John Boyd Dunlop (b. 1840),inventor .
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