WASHINGTON (Reuters) - There is no doubt scientists had a lot of luck on their side in discovering a critter from the age of dinosaurs that rewrites our understanding of the history of early mammals.

From reptile-like ancestors to humans, the new book The Rise and Reign of the Mammals tackles the diversity of mammals like us. The following is an excerpt from The Rise and Reign of Mammals: A New ...

3D models of the jaw and associated middle ear bones of the Triassic mammal ancestor "Thrinaxodon" show that the switch to mammal-like hearing with an eardrum evolved much earlier than previously ...

The world's oldest known mammal has been identified using dental records – predating what scientists previously thought was the first mammal to walk the Earth by millions of years – according to new ...

NEW YORK (AP) -- Maybe you learned this in school: The big dinosaur die-off 65 million years ago was a liberation for mammals, and they quickly produced a bunch of new species that included ancestors ...

The feeding habits of mammals haven't always been what they are today, particularly for omnivores. Some groups of mammals almost exclusively eat meat--take lions and tigers and other big cats as ...

Although mammalian domination of Earth occurred immediately following the dinosaurs’ demise, the new research shows it took 10 million to 15 million more years for the ancestors of modern-day mammals ...

The backbone is the Swiss Army Knife of mammal locomotion. It can function in all sorts of ways that allows living mammals to have remarkable diversity in their movements. They can run, swim, climb ...

You are looking at one of the most important sensory shifts in mammal history: the rise of sensitive hearing. Modern mammals rely on a middle ear with an eardrum and tiny bones that detect faint ...