Bats are the only mammals that can actively fly, enabling many species to perform seasonal migrations. In migratory birds, ...

Mammals are quite diverse. They come in all shapes, sizes, colors, and activity levels. They also differ widely by lifespan.

Fossilized teeth discovered in Alaska’s far north have revealed three previously unknown mammal species that lived 73 million ...

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

The outer regions of the brain, the cortex, have specific layers of different cells—neurons—that are similarly ordered among all mammals, from tiny mouse brains to huge elephant brains. However, the ...

Bats, rodents, hedgehogs, and shrews are mammals among the orders that are predicted to have the most undescribed mammals. (Pictured: a bicolored shrew) Werner Korschinsky via Wikimedia Commons under ...

At first glance, dolphins, sharks, and whales all cut similar figures as they glide through the ocean: sleek fins, smooth ...

Modern mammals are known for their big brains. But new analyses of mammal skulls from creatures that lived shortly after the dinosaur mass extinction show that those brains weren’t always a foregone ...

De-extinction startup Colossal claims it has built an artificial womb capable of supporting mammal development—and it's ...

Dinosaurs largely died off when a Manhattan-size asteroid slammed into Earth 66 million years ago. Meanwhile, in the shadows, tiny mammals had steadily picked up adaptations that helped them survive ...