Editing 1900 in science (section)

==Mathematics==
* [[Max Dehn]] introduces two examples of [[Dehn plane]] and the [[Dehn invariant]].
* [[David Hilbert]] states [[Hilbert's problems|his list of 23 problems]] which show where some further mathematical work is needed.
* [[Russell's paradox]] is first discovered by [[Ernst Zermelo]] but he does not publish it, and it is known only to [[David Hilbert|Hilbert]], [[Edmund Husserl|Husserl]] and other members of the [[University of Göttingen]].
* [[Gaston Tarry]] confirms [[Leonhard Euler|Euler]]'s conjecture that no 6×6 orthogonal [[Graeco-Latin square#Thirty-six officers problem|Graeco-Latin square]] is possible.<ref>{{cite web|url=http://academic.scranton.edu/faculty/doughertys1/euler.htm |title=36 Officer Problem |url-status=dead |archiveurl=https://web.archive.org/web/20080828085817/http://academic.scranton.edu/faculty/doughertys1/euler.htm |archivedate=2008-08-28 }}</ref>
* [[Alfred Young (mathematician)|Alfred Young]] introduces the [[Young tableau]].