Home›Categories›Open QuestionsCategoriesOpen QuestionsCitation FormatsGeneral ReferenceGeneral Reference Citation TextGeography Atlas. "Open Questions." Accessed August 30, 2026. https://geography.interactiveatlas.org/categories/open-questions-index.Copy General ReferenceAPA StyleAPA Style Citation TextGeography Atlas. (n.d.). Open Questions. Retrieved August 30, 2026, from https://geography.interactiveatlas.org/categories/open-questions-indexCopy APA StyleBibTeXBibTeX Citation Text@misc{geographyatlas-open-questions, author = {Geography Atlas}, title = {Open Questions}, year = {2026}, url = {https://geography.interactiveatlas.org/categories/open-questions-index}, note = {Accessed August 30, 2026} }Copy BibTeXReference and ClassificationDevelopingCross-Tradition ConnectionsComments (0)Reader Challenges (0 open reader challenges)Cross-Tradition ConnectionsContainsHow many continents are there: five, six or seven?, Open Questions Well-attested How much carbon will permafrost thaw actually release this century, and how much of it will come from abrupt rather than gradual thaw?, Open Questions Well-attested Is Australia alone, or the wider region of Oceania, the seventh continent?, Open Questions Well-attested Is Zealandia, the largely submerged landmass in the southwest Pacific, an eighth continent?, Open Questions Well-attested When Was Timbuktu Founded?, Open Questions Well-attested Where does Europe end and Asia begin?, Open Questions Well-attested Which islands and peoples actually belong inside Melanesia, and does the category itself still hold together?, Open Questions Well-attested Comments (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