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 ...

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

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 ...

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 ...