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List of years in science (Table)
… 1911 • 1912 • 1913 • 1914 • 1915 • 1916 • 1917 •    1918 • 1919 • 1920 – 1921 – 1922 • 1923 • 1924 •    1925 • 1926 • 1927 • 1928 • 1929 • 1930 • 1931 …
Related time period or subjects
… 1918 • 1919 • 1920 – 1921 – 1922 • 1923 • 1924 … … 1890s • 1900s • 1910s – 1920s – 1930s • 1940s • 1950s … … 19th century – 20th century – 21st century …
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The year 1921 in science and technology involved some significant events, listed below.

Contents 1 Chemistry 2 Medicine 3 Physics 4 Awards 5 Births 6 Deaths

[edit] Chemistry

• Thomas Midgley discovers the effective anti-knocking properties of Tetra-ethyl lead, which is used in "leaded" gasoline (petrol).

[edit] 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.

[edit] Physics

• T. Kaluza demonstrates that a five-dimensional version of Albert Einstein's equations unifies gravitation and electromagnetism.

[edit] Awards

• Nobel Prize
  • Physics - Albert Einstein
  • Chemistry - Frederick Soddy
  • Physiology or Medicine - not awarded

[edit] Births

[edit] Deaths

• March 29 - John Burroughs (b. 1837), naturalist.
• October 23 - John Boyd Dunlop (b. 1840), inventor.