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.

Many mammals are true hibernators and remain dormant through the winter, but a lot of them stay active, at least to some degree. There is so much luck involved in spotting wildlife. I think about this ...

Laziness in the animal kingdom is often a clever survival strategy. It helps conserve energy in tough environments, with many ...

We mammals and birds are homeothermic, or “warm-blooded.” We maintain a relatively constant temperature regardless of the temperature outside. There are a variety of strategies that are used to ...

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

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

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 ...

“The orange mutation affects a gene on the X chromosome. In mammals, males have a single X chromosome and therefore one copy ...

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