Roaming North America during the Late Cretaceous, this ceratopsid measured about 8 meters long and weighed around 2 to 4 tons ...

The research team notes that several of their findings mark the first time that these eggshells have been identified in North America. They suggest that Cretaceous North America was more complex ...

The study provides the earliest evidence of multiple oviraptorosaurs living in close range in North America. The findings support the idea that Cretaceous North American ecosystems were more ...

The six-mile-wide asteroid punched a one-way ticket toward extinction for all non-avian dinosaurs. Some 66 million years ...

Mixodectes belonged to an extinct family known as mixodectids and lived during the Paleocene epoch. This geological epoch ...

Mixodectes was quite large for a tree-dwelling mammal in North America during the early Paleocene -- the geological epoch that followed the Cretaceous-Paleogene extinction event that killed off ...

Meet Triceratops, the dinosaur with the longest horns! This powerful herbivore roamed Earth millions of years ago, battling ...

An international team of scientists unearthed a remarkable diversity of fossil eggshells in Utah's Cedar Mountain Formation, challenging long-held assumptions about the prehistoric ecosystems of ...