Humans appear to be the only species clearly proven to shed tears specifically because of emotions. Elephants, primates, and dogs show behaviors and biological responses that come closest to human ...

Add Yahoo as a preferred source to see more of our stories on Google. Guest Opinion. Altruism is helping without a benefit and sometimes at a risk to one’s self. Animals helping others of their own ...

The evolutionary case for eating meat is etched into human anatomy — but so is the case against it. The science deserves more ...

If you've ever wondered how farming spread far and wide, our research on past human societies offers one explanation: contact between different groups often drives change. A new study led by an ...

Photograph of three male zebra finches (Taeniopygia castanotis), whose mating calls were used as part of the study. Credit: Raina Fan. The bright colors of butterfly wings, the sweet aromas of flowers ...

A new study shows that early humans shifted from hunting giants to smaller animals, shaping tools, survival, and intelligence.

Crying is one of the most recognizable human emotional signals. Tears appear when people experience grief, relief, joy, or deep stress. Because this response is so familiar, observers often assume ...