especially in mammals. Because some of the ear’s structure involves bones, much of the evolution of the ear can be followed through the fossil record. The evolution of the mammalian ear is well ...

Despite not being particularly mammal-looking, the earliest true mammals began to rise about 200 million years ago, when ...

And so on. Despite these differences, all mammals share four traits that are shown in the diagram below: hair, mammary glands, a hinged jaw, and three tiny middle ear bones. Most have specialized ...

Scientists have discovered the oldest known animal with saber teeth: a predator that lived 270 million years ago. This animal ...

Vaguely dog-like” animal is one of the oldest-known close cousins of modern mammals. Researchers have discovered the oldest ...

Recent fossil discoveries have shed light on the complex journey of early mammal evolution. These findings reveal that key ...

Scientists have discovered the oldest known saber-toothed predator, a 270-million-year-old gorgonopsian therapsid fossil.

The most common form of hearing loss is caused by the death of cochlear hair cells in the organ of Corti, and once lost, hair cells in humans and other mammals do not regenerate. In contrast, ...