Fossilised remains of newly identified dinosaur species and mammal suggest they were both predator and quarry to each other.

Scientists discovered two small mammals inside the juvenile dinosaur’s stomach cavity. One was a eutherian, a distant relative of modern placental mammals. The second was a gobiconodontid ...

Researchers believe these are some of the oldest known fossils from the line of Eutherian mammals. Examinations unveiled that the fossils were 145 million years old. Researchers were stunned to ...

The fossil of Huadanosaurus sinensis contained the remains of two mammals: a complete skeleton of a eutriconodont and fragments of a eutherian. "Huadanosaurus had robust jaws and powerful neck muscles ...

2209139119) for comparisons within mammals, "94 inversions, 16 fissions, and 14 fusions that occurred over 53 My differentiated the therian from the descendent eutherian ancestor." An unrelated topic ...

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, new research has revealed. More mammals were living on the ground ...

This extraordinary diversity raises a fundamental question: what enables long-lived mammals to maintain health into old age? In a new study published in Nature Communications, researchers from Bar ...

A study has shown that a dangerous game of "brinkmanship" between rival genes in mammals could help explain why many fertilized eggs don't result in a new life. Within the genome, genes can be in ...

Life looked different after an asteroid crashed into the planet around 66 million years ago. The dinosaurs died out, the arboreal mammals declined, and the terrestrial mammals thrived. The traditional ...