“While the human penis functions primarily to transfer sperm, our result suggests its unusual large size evolved as a sexual ornament to attract females rather than purely as a badge of status to ...

Over the past few years, studies have suggested that plastic particles from bottles, food packaging and waste have been ...

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to chimpanzees. By comparing full and half siblings across species and human cultures, ...

The U.S. has finalized its withdrawal from the World Health Organization, one year after President Donald Trump announced ...

Researchers discovered that Hawaiian monk seals use a surprisingly complex range of underwater sounds, including new call ...

Hidden RNA signals in sperm reveal an "aging cliff" that could impact offspring health.

Increasing paternal age has been linked to elevated health risks for the next generation, including higher risks of obesity ...

Epaulette sharks can reproduce without any measurable increase in energy use, stunning researchers who expected egg-laying to ...

The US biomedical funding agency also hints at future restrictions on research involving human embryonic stem cells.

Size matters” sounds like a tabloid cliché, but for evolutionary biologists the size of the human penis is truly a puzzle. Compared to other great apes, such as chimpanzees and go ...

The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

Epaulette shark remain 'remarkably stable' throughout a reproduction process.