We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.
Last full accuracy audit: 2026-08-29 · 9 entries checked · 4 flagged · 7 issues confirmed · 4 corrected · 3 still open
Tropic of Cancer — The claim that Mount Everest is the highest mountain on or adjacent to the Tropic of Cancer is incorrect; Everest is about 4.5 degrees north of the Tropic.
Tropic of Capricorn — The entry uses inconsistent latitudes: the STATS line lists 23°26′09.0″ S, but the length is given for 23°26′11.7″S; the length should correspond to the current official latitude.
Tropic of Capricorn — The drift rate statement '15 meters per year' is an approximation; 0.47 arcseconds per year corresponds to about 14.5 meters, not exactly 15 meters.
Geographic coordinate system — Eratosthenes measured Earth's circumference using the Equator as a reference, not a parallel through Rhodes and the Hellespont.
Geographic coordinate system — The 180th meridian is the basis for the International Date Line, though it deviates in places; stating they are not to be conflated is misleading.
Longitude — The claim that John Harrison received the top reward of £20,000 in 1773 is inaccurate; he received multiple payments totaling £23,065, and the £20,000 prize was never paid as a single sum.
Longitude — The claim that wireless time signals for ships were transmitted from Halifax, Nova Scotia starting in 1907 is inaccurate; the first regular wireless time signals for ships were from the Eiffel Tower in 1910 and the U.S. Naval Observatory in 1904, and Halifax b
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