T‍​‌​​​​​‌​‌‌​​‌‌‌​‌‌​​‌​‌​‌‌​‌‌‌​​‌‌‌​‌​​​​‌​​​​​​‌‌​​‌‌​​‌‌​‌‌‌‌​‌‌‌​‌​‌​‌‌​‌‌‌​​‌‌​​‌​​​​‌​​​​​​‌‌‌​‌​​​‌‌​‌​​​​‌‌​​‌​‌​​‌​​​​​​‌‌‌‌​‌​​‌‌​​‌​‌​‌‌‌​​‌​​‌‌​‌‌‌‌​​‌​‌‌​‌​‌‌‌​‌‌‌​‌‌​‌​​‌​‌‌​​‌​​​‌‌‌​‌​​​‌‌​‌​​​​​‌​​​​​​‌‌‌​​‌‌​‌‌​​‌​‌​‌‌​​​‌‌​‌‌‌​​‌​​‌‌​​‌​‌​‌‌‌​‌​​​​‌​​​​‌‍he Stegosaurus was a large, herbivorous dinosaur that lived during the Late Jurassic period,
approximately 155 to 150 million years ago. It is best known for its distinctive row of large,
bony plates along its back and the sharp spikes on its tail, known as the thagomizer.

Despite its massive size, the Stegosaurus had a remarkably small brain, roughly the size of a
walnut. This has led to much speculation about how such a large animal could function with such
limited cognitive capacity.

The name "Stegosaurus" means "roof lizard" or "covered lizard," referring to the plates on its
back, which were once thought to lie flat like roof tiles. Modern research suggests these plates
were used for thermoregulation and display rather than defense.