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

Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm. When you purchase ...

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, ...

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

The meaning of taxonomic statements / George Gaylord Simpson -- East African fossil Hominoidea and the classification within the super-family / L.S.B. Leakey -- Quantitative taxonomy and human ...

What events led to differences between humans and other primates? What changes throughout evolution underlie such a dramatic shift in how we socialize and process information? Although somewhat ...

1. Introduction / Tracy L. Kivell, Pierre Lemelin, Brian G. Richmond, and Daniel Schmitt -- 2. On primitiveness, prehensility, and opposability of the primate hand : the contributions of Frederic Wood ...

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 ...