Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

Stone Age arrowheads found in South Africa showcase the knowledge and strategy of prehistoric hunter-gatherers, according to ...

Defecation is commonly treated as a universal feature of animal life, a visible outcome of digestion and metabolic turnover.

Placozoa are among the simplest animals in the world. They were initially discovered living on the walls of aquariums in a ...

For decades, this question has bewildered biologists. Now, by studying Placozoa, scientists at Stanford University have ...

Animals have evolved crab-like bodies at least five times throughout history, a process known as carcinization.

For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death ...

Fossils of tiny, jawless marine animals reveal tooth structures sharper than sharks or steel, forcing scientists to rethink ...

A bright green sea slug along America’s coast feeds on sunlight, not food, borrowing plant power to survive months unfed, ...

A disturbing video showing a dog being shot on an East Texas ranch has led to the arrest of a German shepherd breeder and a ...

Beavers, earthworms, prairie dogs, elephants, and more don't just live in ecosystems, they reshape them to the benefit of ...

Despite claims to “drain the swamp” and cut wasteful government spending, and despite the efforts of Elon Musk and a new ...