First, no one is sure why we, or any other animal, dream. During the past century, however, scientists have made significant progress in understanding the factors that influence sleep and dreaming.

Mammals live all across the world. They can be found living in the ground, in trees, and even in the sea. There are many different kinds of mammal, including us humans! Find out more about different ...

The lower jaws of lizards, birds, fish and even dinosaurs are comprised of multiple bones per side. Yet mammals diverged from all other vertebrates and settled on just one bone, repurposing the extra ...

From its long, flexible trunk to its loud trumpeting sounds, there’s a lot to admire about an elephant. But how much do you know about these massive creatures? Where do they live? How big can they get ...

Warm-bloodedness is a key trait of mammals, but it was long a mystery when proto-mammals evolved this feature to stand out from their more reptilian, cold-blooded ancestors. Now, in a new study ...

They are the most successful mammals that you probably haven’t heard of. Multituberculates were squirrel-like mammals that first evolved in the Jurassic, about 170 million years ago, and survived ...

Scientists have discovered that mammals living in social groups or with companions often live longer than animals that spend ...

From the 20-foot-long jawbones of the filter-feeding blue whale to the short, but bone-crushing, jaws of the hyena and the delicate chin bones of a human, the pair of lower jawbones characteristic of ...