A growing reference on specimens, minerals and the divisions of deep time — written and maintained by the site's admins.
76 entries · page 5 of 7
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Pectinodon was a small, feathered troodontid theropod dinosaur from the Late Cretaceous known f…
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Placerias was a large, herbivorous dicynodont synapsid from the Late Triassic known for its bul…
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Protoceratops was a small hornless ceratopsian dinosaur from the Late Cretaceous known for its …
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Protostegidae were giant prehistoric sea turtles from the Cretaceous known for their large size…
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Flying reptiles that dominated the skies for over 150 million years, living alongside the dinos…
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A long-snouted tyrannosaurid from the Late Cretaceous of China, nicknamed "Pinocchio Rex" for i…
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Quetzalcoatlus was a gigantic flying pterosaur from the Late Cretaceous known as one of the lar…
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A large carnivorous dinosaur from India that lived during the Late Cretaceous and was distingui…
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Rapetosaurus was a titanosaur sauropod dinosaur from the Late Cretaceous known for its long nec…
The second era of the Proterozoic Eon, marked by the Great Oxidation Event, widespread continen…
The first era of the Proterozoic Eon, marked by the beginning of Earth's atmospheric oxygenatio…
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Simosuchus was a small, plant-eating terrestrial crocodilian from the Late Cretaceous known for…