Neither Triceratops horridus nor Triceratops prorsus (the two valid species of Triceratops) was something a hungry carnivore would want to attack from the front, because if one of those horns ...

The dinosaur with a long nasal horn and shorter beak is a Triceratops prorsus. It was only found near the top of the Hell Creek Formation. Skulls found in the middle of the Hell Creek Formation ...

Since Triceratops' discovery in 1887, up to 16 species of the dinosaur have been proposed, but only two species — T. horridus and T. prorsus — are currently considered valid, according to a ...

Triceratops prorsus and the more common Triceratops horridus. Triceratops could stretch to nearly 30 feet long and weighed 6 to 8 tons. These plant-eating animals dwelled in western North America from ...

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Reconstruction of a late Maastrichtian (~66 million years ago) palaeoenvironment in North America, where a floodplain is roamed by dinosaurs like Tyrannosaurus rex, Edmontosaurus annectens and ...

horridus adapted to the other breed (T. prorsus) within the span of one or two million years. For centuries, scientists have studied Triceratops fossils to understand their behavior. And the frills ...

The dinosaur known as triceratops didn't always have the distinctive triple horns that gave it its name, researchers say; in fact, they've determined, those horns took millions of years to evolve.