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One report from CU Boulder even suggests that 500 million years ago, Colorado had a coastal environment, making it a perfect home for a variety of different species to thrive. .

Today, Colorado remains known for its incredible range of species, but here are a few that you may not have known once called the Centennial State home.

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Paleontologists believe that stegosauruses roamed the Centennial State roughly 155 million years ago. .

Stegosauruses were a Jurassic species that are estimated to have been around 30 feet long and 15 feet tall. .

Ancient Camels, or Camelops, likely called Colorado home starting 2.6 million years ago.

"Like living camels, Camelops had two-toed, hooved feet and a long neck.

In 2021, crews from the Colorado Department of Transportation discovered Camelops fossils while working at the 'Central 70 Project' construction site. .

Photo Credit: Kiewit Infrastructure Co.

Photo Credit: LG-Photography (iStock).

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They stood at around six feet tall and were around ten feet long from snout to tail. 

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Giant Ground Sloths walked the earth around 35 million years ago, during the Pleistocene Era

These massive mammals were estimated to be around 10 feet long and weighed around 2,200 pounds, according to NPS. 

With a similar build to the modern cheetah, it's believed that the American Cheetah is the reason Colorado remains home to the second-fastest mammal on the planet – the pronghorn

Full skeletal remains of this animal have been found on the continent, with fossils discovered in Colorado