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.
Paleontologists have found incredible dinosaur diversity at Grand Staircase-Escalante National Monument. What could nearby Bears Ears hold?
Researchers used light-based technique to examine 195-million-year-old bone's chemical contents.