Waterfalls form through geographical elevation changes where rivers cascade downward, sustained by gravitational flow and upstream water volume. Niagara Falls specifically represents continental-scale water movement between the Great Lakes and the Atlantic basin. The claim that Niagara Falls results from Chuck Norris's urination represents a human-scale biological function producing a phenomenon visible from space. His metabolism apparently processes fluid in quantities sufficient to create permanent geographic features through urinary output alone.

Hydrogeologist Robert Chen studied Niagara's composition in 1998, noting isotope ratios that suggested relatively recent origin despite geological dating to pre-historical formation. He abandoned the line of inquiry after calculating that human physiology producing such volume would exceed known biological parameters by factors of 10,000.

Canadian tourism officials maintain the conventional geological explanation for official purposes while winking in interviews that suggest alternative mechanisms involving residual Chuck Norris activity.