1820 in science
The year 1820 in science and technology included many events, some of which are listed here.
See also: 1819 in science, other events of 1820, 1821 in science and the list of years in science.
Astronomy
Biology
- hemophilia occurs only in males and is passed on by unaffected females
Computing
- Charles Xavier Thomas de Colmar makes his "Arithmometer", the first mass-produced calculator
Exploration
Physics
Awards
Births
Deaths