Why do humans have larger penises than other primates? New research tests attraction, rivalry, and sexual selection for ...

The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

Modern comforts promise ease, yet a growing body of research suggests our bodies are still tuned for a very different world. Instead of thriving, many of us are developing chronic illnesses, fertility ...

Exclusive: Some scientists say many detections are most likely error, with one high-profile study called a ‘joke’ ...

We know that some animals are bilaterian—meaning they display bilateral symmetry—while others are not, but nature is rarely ...

The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits and starts over the four billion years of our ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

Despite its importance, the heart is one of the few tissues in the human body that can't repair damage very well – or at ...