If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have evolved testicles of all different sizes. In almost all these separate cases, ...

The pelvis is often called the keystone of upright movement. It helps explain how human ancestors left life on all fours ...

What do thumbs and brains have in common? According to recent research, their growth has been linked throughout the evolution of the primates, suggesting that the long thumbs and large brains of ...

BUFFALO, N.Y. ­­ ­ ­­— Saliva is a bodily fluid most of us take for granted despite the significant roles it plays: aiding in digestion, maintaining strong teeth and defending against oral disease.

Scientists have traced kissing back to early primates, suggesting it began long before humans evolved. Their analysis points to great apes and even Neanderthals sharing forms of kissing millions of ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. At the ends of your toes are an evolutionary artifact of humans ...

What if your gut microbes helped power your brain? A new study reveals that the energy-hungry human brain may have evolved with a big assist from our gut bacteria. By transplanting gut microbes from ...

AMES, Iowa – A new study from an Iowa State University biologist shows that menopause in mid-life is a uniquely human phenomenon among primates. The study, published in the Proceedings of the National ...