Stegosaurus fossils date to between 155 and 150 million years ago. Presumably they died out around 150 million years ago, during the Tithonian stage of the Jurassic period.
They were over hunted for feathers and as food
Dinosuars,woolly mammoths,and some manatees
Either because of climate change, or competition from Cro-Magnon man (modern humans).
Stegosaurus became the state dinosaur of Colorado in 1982. Stegosaurus probably was chosen as the state dinosaur because it was discovered in Colorado, and it's an extremely famous type of dinosaur.
Sabre Toothed Tigers became extinct because of hunting and the Ice Age.
There are four currently accepted species in the genus Stegosaurus. They are Stegosaurus armatus, Stegosaurus stenops, Stegosaurus sulcatus, and Stegosaurus longispinus.
The DoDo bird is estimated to have been extinct since the mid 1700s due to human predation .
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The remains of about 80 different Stegosaurus have been discovered. They belong to four different species, Stegosaurus armatus, Stegosaurus stenops, Stegosaurus sulcatus, and Stegosaurus longispinus.
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