Editing 1920 in science (section)

==Deaths==
* January 3 – [[Zygmunt Janiszewski]], [[Poland|Polish]] [[mathematician]] (born [[1888 in science|1888]]).
* January 6 – [[Hieronymus Georg Zeuthen]], [[Denmark|Danish]] mathematician (born [[1839 in science|1839]]).
* March 13 – [[Charles Lapworth]], English [[geologist]] (born [[1842 in science|1842]]).
* March 26 – [[William Chester Minor]], American [[surgeon]] (born [[1834 in science|1834]]).
* March 31 – [[Paul Bachmann]], German mathematician (born [[1837 in science|1837]]).
* April 3 – [[Mary Katharine Brandegee]], American botanist (born [[1844 in science|1844]]).
* April 8 – [[John Brashear]], American astronomer (born [[1840 in science|1840]]).
* April 9 – [[Moritz Cantor]], German historian of mathematics (born [[1829 in science|1829]]).
* April 26 – [[Srinivasa Ramanujan]], Indian mathematician (born [[1887 in science|1887]]).
* June 20
** [[Marie Adolphe Carnot]], French chemist and mining engineer (born [[1839 in science|1839]]).
** [[John Grigg (astronomer)|John Grigg]], New Zealand [[astronomer]] (born [[1838 in science|1838]]).
* August 10 – [[Ádám Politzer]], [[Kingdom of Hungary|Hungarian]] [[otologist]] (born [[1835 in science|1835]]).
* August 12 – [[Hermann Struve]], Russian-born astronomer (born [[1854 in science|1854]]).
* August 16 – [[Joseph Norman Lockyer|Norman Lockyer]], English [[astronomer]] (born [[1836 in science|1836]]).
* August 31 – [[Wilhelm Wundt]], German [[physiologist]] and [[psychologist]] (born [[1832 in science|1832]]).
* October 17 – [[Reginald Farrer]], English [[botanist]] (born [[1880 in science|1880]]).
* November 4 – [[Ludwig Struve]], Russian astronomer (born [[1858 in science|1858]]).
* December 3 – [[William de Wiveleslie Abney]], English astronomer and photographer (born [[1843 in science|1843]]).