Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep.

Over 130 mammal species can delay embryonic development, giving their offspring the best possible chance of survival in ideal ...

Malabar giant squirrels are not only the largest squirrels in the world, but a keystone species in their forest ecosystem.

Most people think of moths as small insects fluttering across porch lights, but some species greatly challenge that image.

Shielded from development and agriculture, many archaeological sites from ancient Greece have now become inadvertent safe ...

As I was driving down the highway one spring day eight years ago, I saw a shaggy, gray-black canine cruising along on the ...

An unprecedented avian flu outbreak in Argentine Patagonia devastated a stable elephant seal colony, highlighting the rising threat of infectious disease to wildlife in a warming world.

It's elephant seal mating and birthing season and people from all over are coming to the Central Coast to watch these large ...

These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

Joan Garcia showed against Espanyol that he could become a Barcelona great with a string of match-winning saves ...

Exploring the instinctive, environmental, and survival-driven reasons behind street dogs' nocturnal vocalisations and the ...