Editing 1823 in science (section)

==Births==
* January 3 – [[Robert Whitehead (engineer)|Robert Whitehead]] (died [[1905 in science|1905]]), [[English people|English]] inventor of the self-propelled [[torpedo]].
* January 8 – [[Alfred Russel Wallace]] (died [[1913 in science|1913]]), [[British people|British]] [[Natural history|naturalist]] who devises the theory of [[natural selection]] at the same time as [[Charles Darwin]].
* February 3 – [[Spencer Fullerton Baird]] (died [[1887 in science|1887]]), [[Americans|American]] [[ornithologist]] and [[ichthyologist]].
* March 21 – [[Jules Émile Planchon]] (died [[1888 in science|1888]]), [[French people|French]] [[botanist]].
* December 22 – [[Jean Henri Fabre]] (died [[1915 in science|1915]]), French [[entomologist]].
* December 23 – [[Thomas W. Evans]] (died [[1897 in science|1897]]), American-born [[dentist]].<ref>{{citation|editor-last=Johnson|editor-first=Rossiter|editor2-last=Brown|editor2-first=John Howard|title=The Twentieth Century Biographical Dictionary of Notable Americans|publisher=The Biographical Society|volume=4|place=Boston, MA|year=1904|contribution=Thomas William Evans|contribution-url=https://books.google.com/books?id=Q1IDAAAAYAAJ&pg=PT25#PPT24,M1|access-date=2009-06-12}}.</ref>