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.

How do mammals manage to eat in situations that cause anxiety, step into exposed spaces, or slow down when anxiety drives ...

The bluff at La Jolla Cove in San Diego is covered with pelicans and cormorants; below, some two dozen sea lions lounge on a ...

It isn’t just snakes that fill up the reptilian quota of egg-laying animals. A group of reptiles — known as squamates — ...

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 ...

Have you ever wondered why you don’t have thick hair covering your whole body like a dog, cat or gorilla does? Humans aren’t the only mammals with sparse hair. Elephants, rhinos and naked mole rats ...

A highly contagious avian flu is infecting birds all over the globe. In the U.S., farmers have lost, or had to kill, over 58 million birds to try and prevent the spread of the virus. The H5N1 strain ...

A new study shows farming and livestock reshaped global mammal communities, collapsing natural boundaries after the last Ice ...

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