Geologists have turned a series of 200 million-year-old lake-bed sediments into an epic narrative of the dinosaurs’ journey from ecological obscurity to Earthly supremacy, a mystery that has lingered even as their disappearance is explained. The dino path to dominance appears to have been cleared when the supercontinent Pangea cracked, setting off 600,000 years of volcanic activity that wiped out... 

Scientists have discovered 243-million-year-old fossils of dinosaurs’ closest relatives, pushing back the origin of dinosaurs by at least 10 million years. The dinosaur-like creature, Asilisaurus kongwe, was about the size of a Labrador retriever and had teeth and jawbones ideally shaped for eating plants, indicating it ate a mostly vegetarian diet. “This shows that the lineage leading to dinosaurs... 

Scientists have found a 67 million-year-old fossil of a snake coiled around dinosaur eggs and a hatchling. This is the first evidence of snakes eating dinosaurs. “It’s a stunning, once-in-a-lifetime find,” said paleontologist Paul Sereno of the University of Chicago, who was not involved in the study. “We’ve caught one of the rarest moments in the fossil record, which is prey and predator,...