For decades, paleontologists have held up uintatheres as a prime illustration of sexual dimorphism, or the tendency for males ...

In many well-known mammals today, males are bigger than females and carry the showier horns or teeth. Paleontologists assumed the same of Uintatherium, an extinct giant with six bony knobs on its head ...

Researchers have shown that sex differences in animals vary dramatically across species, organs and developmental stages, and evolve quickly at the gene level but slowly at the cell type level.

Bee researchers at Heinrich Heine University Düsseldorf (HHU) headed by Professor Dr. Martin Beye have identified a new gene in honeybees, which is responsible for the dimorphic eye differentiation ...

Humans are sexually dimorphic, which means that males and females are, on average, different sizes. In humans, like most sexually dimorphic species, males are typically larger than females. Why does ...

Birds possess unique skin appendages called feathers that are derived from the outermost layer of skin cells. Feathers are important for several functions, such as flight, temperature regulation, ...

One of the challenges that birders, naturalists, and animal enthusiast face is identifying species. It can be difficult to do in the wild, especially if the species is sexually dimorphic. Sexual ...

As butterflies flit among flowers, they don't all view blossoms the same way. In a phenomenon called sexually dimorphic vision, females of some butterfly species perceive ultraviolet color while the ...

Researchers from Xi'an Jiaotong University and collaborating institutions in China have identified sexually dimorphic dopamine (DA) circuits in the brain that influence sociosexual preferences in mice ...

Is it a sex difference or a gender difference? According to the Publication Manual of the American Psychological Association, "Gender is cultural and is the term to use when referring to women and men ...