A bird egg can look surprisingly oversized for the body that produced it. That puzzle becomes even stranger when viewed ...

Cold water rushes over gravel and stones as the river winds through forests and wetlands before joining the vast waters of ...

Explore 25 prehistoric animals that are alive today! From deep-sea coelacanths to ancient horseshoe crabs, discover ...

Creatures that bridged the gap between reptiles and mammals may have been bearing live young 90 million years earlier than we thought. One of the hallmarks of all mammals apart from monotremes – ...

Explore 25 organisms that are older than your grandma! From deep-sea sharks to ancient clams, discover Earth's most ...

A model of Microraptor being put on display at the American Museum of Natural History. Microraptor was one of the smallest known dinosaurs, weighing about one pound—roughly the size of a large rabbit.

Reproduction is central to the survival of all living organisms. Over millions of years, animal species on Earth have evolved a remarkable variety of mating strategies, ranging from physical fights ...

Some cynodonts may have been giving birth to live young much sooner in evolutionary history than previously assumed. A new ...

The dolphin-like marine mammals returned to San Francisco Bay in 2008 after a decades-long absence from the area. Scientists ...

Successful navigation of the social environment depends on the ability to rapidly evaluate conspecifics and adjust behaviour accordingly. Encounters with unfamiliar individuals are particularly ...

Growth rings on a fossil bone suggest at least one mammal ancestor gave birth to live young rather than laying eggs 236 million years ago.

This work describes a valuable method for monitoring pathogens using an innovative, field-deployable device that attracts animals and collects saliva on filter paper in a non-invasive manner. While ...