Scientists demonstrate new driver of extinction

The lengths that some males go to attract a mate can pay off in the short-term. But according to a new study from scientists at the Smithsonian's National Museum of Natural History (NMNH), extravagant investments in reproduction ...

Gender roles in ancient times

Two new studies by Osaka University researchers provide insights on why male and female bodies of the same species differ. The studies show factors that regulate the expression of doublesex1, a gene responsible for the growth ...

Can we easily distinguish male and female protoceratops?

Anatomical and behavioral differences distinguish males and females in many extant and extinct animals. For instance, male peacocks have a large and flashy tail, whereas females are smaller and less brightly colored. Male ...

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Polymorphism

Polymorphism or dimorphism may refer to:

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