Home›Open QuestionsCategoryOpen Questions10 entries. Click any to see everything it connects to.BrowseCompareCompare At A Past YearEnter a year to compare these entries as the atlas records them at that moment. Leave it empty for the present. A year before the common era is entered with a minus sign, so 44 BCE is minus 44.Show This YearSelect all 10Can earthquakes be reliably predicted?Open Questions2 linksDoes P equal NP?Open Questions2 linksIn which century did Panini, the Sanskrit grammarian, live?Open Questions2 linksWhat causes high-temperature superconductivity?Open Questions2 linksWhat is dark energy?Open Questions2 linksWhat is the biological basis of consciousness?Open Questions2 linksWhen did mathematics become a discipline rather than a scattered set of practical and philosophical techniques?Open Questions2 linksWhen was the photometer invented, and by whom?Open Questions2 linksWhere did James Prescott Joule perform the mechanical equivalent of heat experiments (paddle-wheel apparatus) that produced his 1850 published value?Open Questions2 linksWhy is there more matter than antimatter in the universe?Open Questions2 links