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: 2026-09-08 · 20 entries checked · 14 flagged · 28 issues confirmed · 0 corrected · 28 still open
Tyrannosaurus rex — The claim that Sue died at age 28 and is the longest estimated life of any tyrannosaur known is not established fact; estimates for Sue's age at death vary (commonly around 28–33 years), and it is not definitively the longest-lived tyrannosaur.
Tyrannosaurus rex — The claim that Sue reached full size at age 19 is speculative; while growth studies suggest T. rex reached near-adult size by around age 20, this is an estimate, not a confirmed fact.
Velociraptor — The entry states 'born=about 75 million years ago; died=about 71 million years ago' as if these are birth and death dates of an individual, but these are the temporal range of the genus, not a single organism. This is a misrepresentation of the data.
Velociraptor — The entry says 'A possible record of Velociraptor is known from the Nemegt Formation.' This is misleading; the Nemegt Formation is younger (about 70 million years ago) and while some fragmentary remains have been tentatively assigned to Velociraptor, they are
Stegosaurus — The first mounted skeleton of a stegosaur (1910) used a composite of specimens, not solely the type specimen of S. ungulatus.
Stegosaurus — The claim that only three species of Stegosaurus are universally recognized is an overstatement, as S. sulcatus is not universally accepted as valid by all researchers.
Spinosaurus — The entry states 'S. mirabilis' is known from the Farak Formation in Niger, but the correct species name is S. maroccanus (though dubious), and the Farak Formation is not widely recognized as a source for a distinct Spinosaurus species.
Spinosaurus — The entry lists 'Oxalaia from the Alcântara Formation in Brazil' as a possible junior synonym of Spinosaurus, but Oxalaia is generally considered a distinct genus of spinosaurid, not a junior synonym of Spinosaurus.
Allosaurus — The entry states Allosaurus lived 155 to 143 million years ago, but 143 Ma extends into the early Cretaceous, which is incorrect.
Allosaurus — The entry says Allosaurus was known for 'over half of the 20th century' as Antrodemus, but the name Antrodemus was used primarily from the 1920s to the 1970s (about 50 years), not 'over half'.
Diplodocus — The genus lived in what is now mid-western North America, at the end of the Jurassic period. Correction: The Morrison Formation is primarily in the western United States (e.g., Colorado, Wyoming, Utah), not 'mid-western' North America; 'mid-western' typically
Diplodocus — Most specimens being found in rocks dated between about 151.88 and 149.1 million years ago, during the latest Kimmeridgian Age. Correction: The Kimmeridgian Age ended at approximately 149.2 million years ago (according to the International Chronostratigraphic
Ankylosaurus — The entry lists Denversaurus as a contemporary, but Denversaurus is a junior synonym of Edmontonia (a nodosaurid) and is not widely recognized as a distinct genus living alongside Ankylosaurus; more importantly, the entry cuts off mid-word after 'Tricerato', l
Pteranodon — The intro states Pteranodon lived in Alabama, but Pteranodon fossils are known from Kansas, Nebraska, Wyoming, and South Dakota, not from Alabama.
Pteranodon — The 'known_for' stat says Pteranodon was the first pterosaur found outside Europe, which is incorrect; earlier pterosaurs were found outside Europe before Pteranodon.
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