Home›Categories›Open QuestionsCategoriesOpen QuestionsCitation FormatsGeneral ReferenceGeneral Reference Citation TextMedicine Atlas. "Open Questions." Accessed August 30, 2026. https://medicine.interactiveatlas.org/categories/open-questions-index.Copy General ReferenceAPA StyleAPA Style Citation TextMedicine Atlas. (n.d.). Open Questions. Retrieved August 30, 2026, from https://medicine.interactiveatlas.org/categories/open-questions-indexCopy APA StyleBibTeXBibTeX Citation Text@misc{medicineatlas-open-questions, author = {Medicine Atlas}, title = {Open Questions}, year = {2026}, url = {https://medicine.interactiveatlas.org/categories/open-questions-index}, note = {Accessed August 30, 2026} }Copy BibTeXReference and ClassificationDevelopingCross-Tradition ConnectionsSourcesComments (0)Reader Challenges (0 open reader challenges)Cross-Tradition ConnectionsContainsWhen did bloodletting originate as a medical practice?, Open Questions Well-attested When Did Couching for Cataracts Originate?, Open Questions Well-attested When did trepanation originate as a medical practice?, Open Questions Well-attested Source Wikipedia: Trepanningtier 2Which culture first described or performed cataract surgery?, Open Questions Well-attested Which polio vaccine strategy, Salk's injected inactivated vaccine or Sabin's live oral vaccine, better serves eradication?, Open Questions Well-attested Why was trepanation performed in prehistoric and ancient societies?, Open Questions Well-attested SourcesWikipedia: Trepanningtier 2WikipediaContains: When did trepanation originate as a medical practice?View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0 open reader challenges)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.View At A Past YearThe atlas records no dated fact of its own for this entry, so there is no other year to choose.Show This Year