Picture a baby Brachiosaurus the size of a golden retriever, hunting for food with its siblings while dodging predators that would happily eat it. Meanwhile, its parents—towering over 40 feet tall—are ...

A reconstruction of a Late Jurassic Dry Mesa Dinosaur Quarry ecosystem around 150 million years ago which shows a diverse array of bipedal theropod dinosaurs including the largest in the ecosystem ...

A lost dinosaur track site in the Saizhurakh area of Mongolia is rediscovered, offering new clues about ancient ecosystems and giant dinosaurs ...

The Morrison Formation is a hotbed of dinosaur fossils. Spanning across much of the western U.S., this layer of rock dates to the Late Jurassic, some 163.5 million to 145 million years ago. It holds ...

Baby dinosaurs weren’t coddled like lion cubs or elephant calves—they were more like prehistoric latchkey kids. New research suggests that young dinosaurs quickly struck out on their own, forming ...

An image of University of Maryland geologist Thomas R. Holtz, Jr. holding a baby crocodile, one of the closest living analogs for dinosaurs. Similar to their dinosaur predecessors, crocodiles guard ...

WASHINGTON — It may have been suicidal for a predator to go after a healthy adult Brachiosaurus, a behemoth weighing perhaps 60 tons that was a member of the long-necked group of dinosaurs called ...