1866 in science
The year 1866 in science and technology included many events, some of which are listed here.
See also: 1865 in science, other events of 1866, 1867 in science and the list of 'years in science'.
Astronomy
Biology
Chemistry
Medicine
- Max Schultze discovers two sorts of 'receptors' in the retina.
- Patrick Manson starts a school of tropical medicine in Hong Kong
Awards
Births
Deaths