Human–dinosaur coexistence

Lore & Background

The idea that non-avian dinosaurs and humans coexisted is rooted in pseudoscience and pseudohistory, and is common among Young Earth creationists, cryptozoologists, and some other groups. This belief often contradicts the scientific understanding of the fossil record and known geological events. Supposed evidence presented for the idea has often been determined to have been a hoax. Some proponents have tried to identify depictions of dinosaurs among ancient artwork or descriptions of cryptids, though such identifications are often based on outdated or incorrect ideas about dinosaur biology and life appearance and often ignore the cultural and artistic context.

Reader's Guide

The concept of human–dinosaur coexistence is significant primarily as a cultural and pseudoscientific phenomenon. It is promoted by Young Earth creationists, who believe the Earth is only a few thousand years old, and by cryptozoologists who propose that some non-avian dinosaurs survive in remote areas. Mainstream scientists consider the claim untenable, noting that the fossil record shows no evidence of non-avian dinosaurs after the Cretaceous–Paleogene extinction, and that their survival would require ghost lineages without fossils for tens of millions of years. Many supposed proofs—such as the Paluxy River footprints, the Acámbaro figures, the Ica stones, and the Tucson artifacts—have been exposed as hoaxes or misinterpretations. The persistence of this belief reflects broader tensions between scientific consensus and certain religious or fringe worldviews, and it continues to appear in speculative fiction, alternative history, and creationist literature.

Did You Know?

• The largest non-avian dinosaur known is Argentinosaurus, reaching up to 30 meters in length, while the smallest non-avian dinosaur is probably the bee-sized hummingbird-like Oculudentavis, though its classification is de
• The largest moa, Dinornis robustus, could reach heights of over 3.5 meters and coexisted with humans before going extinct.
• The supposed stegosaur carving at Ta Prohm is more likely stylized lotus leaves or petals, and the creature has ear flaps not known in stegosaurs.
• The Paluxy River 'human footprints' were identified as eroded dinosaur tracks or deliberate hoaxes, some carved and sold during the Great Depression.