What's In a Face?

Human faces exhibit more diversity than any other physical feature and more than other species. This fact tells us of the social evolution of our ancestors.

The Relationship Between Waist-Hip Ratio and Fertility

In women, a low waist-hip ratio correlates with health, fertility, and attractiveness. However, a new study reveals that it may also distinguish between past and future fertility.

New Details Revealed About an Important Human Ancestor

Another cave of fossils and a surprising young age sheds dramatic new light on the origins of complex behaviors and humanity itself.

Why Play Is Important

Of course we enjoy having fun, but does play have important biological benefits?

The "Guilty Dog" Look and Other Borrowed Signals

The guilty dog look and the human handshake have similar roots in the evolution of animal communication.

Did a Drop in Testosterone Civilize Modern Humans?

Changes in the human face over the last 100,000 years may indicate a reduction in testosterone. This may have been key to the emergence of modern civilization.

Why We Fear

Researchers have found that it is easier to train humans and other primates to fear snakes than other dangers, indicating a genetic predisposition for the fear of snakes.

Why Do We Wince When We're in Pain?

The recent discovery that all mammals make the same pain-face begs the question, why? One reason could be that wincing is a facial expression intended to communicate danger.

Yes, Overprotective Parenting Harms Kids

Overprotective parenting may cause more than just stunted psychological development; it may actually be bad for children's health.

New Study Reveals How Immune System Affects Social Behavior

Could evolution have programmed us to avoid social interactions when we might be contagious?

How a Cultural Meme Was Born

New insights into the origin of language as a mandrill in an English zoo invents a gesture for "leave me alone," and it spreads through the community

Lessons About Gendered Behaviors from Mountain Gorillas

A population of Mountain Gorillas recently underwent a complete upheaval in the most central aspects of their gender-based social structures. If they can do it, so can we.

Yes, Humans Are Still Evolving

Popular claims that human beings are no longer the subject of evolution often confuse the terms "natural selection" and "evolution." Indeed, we are still evolving!

Trauma, PTSD, and Memory Distortion

One of the cruelest aspects of PTSD is that traumatic memories intensify over time, contributing to its progressive nature. This phenomenon may have once had value for humans.

What's in a Voice?

Researchers have discovered a connection between certain female vocal features and physical attractiveness, health, and fertility, indicating an evolutionary mechanism.

This Is Why Stairs Can Leave You Out of Breath

Even if you're in good shape, you probably get winded by quickly running up a flight of stairs. Why? Because your brain tells your body to stop breathing.