How a Cartoon Named a Tail Weapon
In a 1982 Far Side cartoon, a caveman lecturer points to the spiked tail of a dinosaur and says the weapon is named for “the late Thag Simmons.” The joke turned Thag’s name into “thagomizer”—a word that paleontologists later adopted for the cluster of spikes at the end of a stegosaur’s tail.
The term is a vivid example of informal scientific language taking hold. It is widely used, but it is not a formal anatomical name established under the rules for naming species.
Why the Spikes Could Matter
A stegosaur’s tail was more than a trailing appendage. Its muscles and joints could swing it from side to side, bringing the sharp spikes around toward a threat. The arrangement suggests a defensive weapon: a predator approaching from behind could face a forceful, spiked sweep.
That function is inferred from the tail’s shape and construction, rather than directly observed. Still, the word makes the structure easy to picture—and carries the cartoon’s punchline into conversations about a genuine piece of dinosaur anatomy.
