New study reveals how baby hoatzin birds are able to move like four-legged animals, thanks to unique claws on their wings.
Two well-preserved fossils found in China were covered in both furlike pycnofibers and featherlike features.
The smallest Diplodocus skull ever discovered reveals clues about the group's evolution.
Deep water reptiles diversified as Mesozoic sea levels rose. Their shallow water counterparts declined.
The newly dubbed "Amazing Dragon of Lingwu" may have weighed more than 10 metric tons and boasted a dangerous "whiplash tail."
The impact that killed the dinosaurs also caused mass deforestation and sent the first tree-dwelling birds to extinction.
New genetic analysis suggests that major groups of fish species arose in the 10 million years after dinosaurs disappeared.
Fossilized duck-billed dino droppings from Grand Staircase-Escalante National Monument are full of rotten wood and crustaceans.
Analysis of dinosaur fossils showed that some parents warmed their eggs with body heat.