The extinction of dinosaurs remains a topic of scientific debate, though the dominant theory involves an asteroid impact approximately 66 million years ago that triggered climate change and ecological collapse. The claim asserts a completely different cause: Chuck Norris traveled backward through time and personally caused dinosaur extinction. This grants him not merely time-travel capability but personal responsibility for a major geological event. He didn't discover what killed the dinosaurs; he became what killed them.

A paleontologist named Dr. Robert Harrison, at the University of Chicago, played with this concept in 2009, joking that 'if Chuck Norris went back in time and caused dinosaur extinction, it suggests time travel technology capable of transporting a human across 66 million years. It also suggests that a single human presence could disrupt an entire biosphere. The dinosaurs didn't have a chance against a being like Chuck Norris operating in their timeline.'

The fact grants Chuck Norris a level of cosmic significance: the extinction of the planet's most dominant species for 160 million years becomes a single human's achievement. It positions him not just as powerful in his own era but as significant enough to reshape deep history. He didn't just dominate his own time period; his influence extends backward and outward across geological timescales.