It may seem mysterious that your cat walks in circles before settling down for a nap – but there's a good reason behind it.

On a large plot of land outside the small town of Concho, the Cheyenne and Arapaho Tribes manage hundreds of bison. But one ...

Scientists have shared footage from a rare sighting of a bluntnose sixgill shark spotted near the Phoenix Islands in the ...

Scientists have discovered exactly how the human anus may have evolved around 550 million years ago. The body part it may ...

The long-standing question of how animals came to have an anus may have been solved by studies of which genes are active ...

Before hominins intentionally chipped stone to make tools, they likely used sharp rocks already shaped by natural forces.

D modeling reveals that as bird brains grew larger, it led to changes in jaw muscles and joint mechanics—enabling the ...

University of Michigan researchers have developed a statistical method that can be used for such wide-ranging applications as ...

A study published March 27 in the journal Science finds that a unique and ancient spate of genetic mutations was key to the ...

University of California, RiversideMany experts didn’t think such tiny prehistoric fossils would ever be found. Fortunately, ...

The ancestors of humans started making tools about 3.3 million years ago. First they made them out of stone, then they switched to bone as a raw material. Until recently, the earliest clear evidence ...

Pigeons dominate urban areas for a reason. Their ancestors were cliff-dwellers and the city buildings, which mimic pigeon’s ...