Stegosaurus is the classic plated dinosaur most people picture: large back plates, a small head, and a spiked tail used for defense. It lived late in the Jurassic, especially in what is now the western United States, and is best known from the Morrison Formation. This is the famous, fully recognizable stegosaur of popular imagination — the polished, later form of a branch that had already been evolving for quite some time.
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Stegosaurus
By Michael Alan Prestwood
Sun 15 Mar 2026
Published 1 day ago.
Updated 1 day ago.
Dinosaur Evolution
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Stegosaurus
Lived 152 to 145 million years ago.
— map / TST —
Michael Alan Prestwood
Author & Natural Philosopher
Author & Natural Philosopher
Prestwood writes on science-first philosophy, with particular attention to the convergence of disciplines. Drawing on his TST Framework, his work emphasizes rational inquiry grounded in empirical observation while engaging questions at the edges of established knowledge. With TouchstoneTruth positioned as a living touchstone, this work aims to contribute reliable, evolving analysis in an emerging AI era where the credibility of information is increasingly contested.
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