Larger penis size influences female attraction and male rival threat perception, highlighting how sexual and competitive pressures together shaped human sexual evolution.

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

Some think the rise of C-sections means that one day all births will require serious medical intervention. But a surprising new understanding of the pelvis suggests a different story ...

This experimental study used life-sized and screen-based 3D male avatars to test how penis size, height, and body shape ...

It is highly likely that Hume and Smith were acquainted with speciation. Here we suggest that Hume and Smith were ...

Many organisms leverage showy colors for attracting mates. Because color is a property of light (determined by its wavelength), it is easy for humans to see how these colors are used in animal ...

They live beside deadly predators without fear, cause chaos in luxury suburbs, and seem untouchable in both wild and urban ...

The renowned Wildlife Photographer competition has kickstarted its voting campaign for the People’s Choice Award. These are ...

The public will choose the winner of the People’s Choice award in a vote that runs from February 4 to March 18 ...

Let’s turn to animals to answer this question. Just like animals, our attraction is guided by traits that would make someone ...

While bone is twice as tough (resists fracture), ivory has double the strength (withstands breaking completely). Ivory is ...