Stegosaurus lived during the Late Jurassic Period, approximately 150 million years ago. Its habitat consisted of open plains and forests, where it fed on a variety of low-growing plants. Its ability to browse low-growing plants suggests that it was a herbivore specialized in consuming low-growing vegetation, such as ferns and cycads.

Stegosaurus is known for its large dorsal plates, which were arranged in two alternating rows along its neck, back, and tail. These plates have been the subject of much scientific debate, and although their exact function is still not entirely clear, it is thought that they could have been used for display, thermal regulation, or a combination of both. It is unlikely that the plates served as defense, as their position and structure do not support this theory.

In addition to the plates, Stegosaurus had two pairs of long spikes protruding from the end of its tail, which it used as defensive weapons against predators. These spikes, known as "thagomizers," were essential for protection.

Its small head was low to the ground, ideal for browsing low-growing plants.

It had an arched back, relatively short forelegs, and a stiff, muscular tail.

Its ribcage was enormous, housing a digestive system adapted to process large amounts of vegetation.

Stegosaurus fossils have been found primarily in North America, particularly in the Morrison Formation, which spans several states in the western United States. These finds have allowed paleontologists to reconstruct much of its anatomy and better understand its behavior and ecology.