Mean atmospheric O2
Geologic Time Scale
Zuniceratops & White Rhinoceros compared
An adult ceratopsian dinosaur of the genus Zuniceratops from 90 million years ago is compared to a modern adult White Rhinoceros (Ceratotherium simum). The Zuniceratops is 3 feet tall at the shoulder and weighs 250 pounds*, while the White Rhinoceros is 6 feet tall at the shoulder and weighs 7,000 pounds.
* Values are estimates only based upon available paleontological data.
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