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 ...

The investigators, headed by Professor Christine Janis, used fossil bones of marsupials and placental mammals excavated in Western North America, the only place with a good representation of ...

By analysing small-fossilised bone fragments, specifically end of limb bones, from marsupial and placental mammals found in Western North America - the only place with a well-preserved terrestrial ...

But the shape of the digestive system and the structures used for each step vary for different animals. Just like mammals, birds have a digestive tract that is a long tube from mouth to anus.

For many people, though, what happens in between — the journey through the digestive system — is a potentially confusing process. But it doesn’t have to be. Here’s a step-by-step guide to ...

This lifestyle is similar to placental mammals ... This last aspect is crucial. Other mammals may not have long pregnancies because the mother’s immune system can reject the fetus if it grows ...

Emily Carlisle receives funding from the University of Bristol. If you were asked to think of a mammal, chances are high you would think of a placental mammal – horses, dogs, cats, humans, even ...

For years scientists have debated whether placental mammals - a group of animals which includes humans, dogs and bats - existed at the same time as dinosaurs. Now researchers at the University of ...

[Related: The fiery end of the dinosaurs kicked off the golden age of mammals.] The study revealed that a Cretaceous origin for placental mammals, the diverse group that includes humans ...

Fossils of placental mammals are only found in rocks younger than 66 million years old, which is when the asteroid hit Earth, suggesting that the group evolved after the mass extinction.

The word mammal comes from mamma, which is Latin for breast. In Australia, we have many placental mammal species ... That means their immune system is bolstered by milk. All mammals produce ...