Editing 1905 in science (section)

==Physiology and medicine==
* February 9 – Dr. [[Prince A. Morrow]] begins the movement in the United States for [[sex education]] with the founding of the Society of Sanitary and Moral Prophylaxis.<ref>{{cite book|first=Maurice A.|last=Bigelow|title=Sex-Education: A Series of Lectures Concerning Knowledge of Sex and Its Relation to Human Life|publisher=The Macmillan Company|year=1916|page=227}}</ref><ref>{{cite book|title=History of Social Hygiene 1850-1930|publisher=American Social Hygiene Association|year=1930|pages=1–6}}</ref>
* [[Nikolai Korotkov]] first describes [[auscultatory blood pressure measurement]].<ref>{{cite journal|title=A short history of blood pressure measurement|journal=Proceedings of the Royal Society of Medicine|year=1977|first=Jeremy|last=Booth|volume=70|issue=11|pages=793–9|pmid=341169|pmc=1543468|doi=10.1177/003591577707001112}}</ref>
* [[Karl Landsteiner]] first describes [[Meconium#Meconium ileus|Meconium ileus]].<ref>{{cite journal|last=Busch|first=R.|title=On the history of cystic fibrosis|journal=Acta Universitatis Carolinae, Medica|location=Praha|volume=36|issue=1–4|pages=13–5|year=1990|pmid=2130674}}</ref>
* [[Fritz Schaudinn]] and [[Erich Hoffmann]] discover the bacterium that is responsible for [[syphilis]], a spiral-shaped spirochete called ''[[Treponema pallidum]]''.