Scientists have documented same-sex behavior in many animals. Learn what it means, how it varies, and why human labels can mislead.

Both the UK and US Governments have pledged to end research using animals, but is such a goal realistic? And how might it change medical research? Talha Burki reports.

A surprisingly small detail in the skin may play an outsized role in how young skin looks and how well it repairs scars. Researchers say the clue is a microscopic structure found in humans, pigs, and ...

Animals may not celebrate Valentine’s Day, but courtship rituals, pair bonding and fierce competition shape love in the wild.

Noise pollution is affecting bird behaviour across the globe, disrupting everything from courtship songs to the ability to find food and avoid predators, ...

A recent French study seems to verify what many old-time horsemen have long believed: that horses can smell fear in humans, ...

Since their larvae are dependent on the host’s body for their first phase of life, it behooves the wasp to improve conditions in the body in whatever way it can. For example, some parasitic wasps are ...

Humanity has been reaching for the stars for decades. Moon landings, Mars rovers, and long stays on the ISS. But there’s one ...

A new international study warns that reproductive health in space is no longer a theoretical concern and that questions about ...

In 1886, chemist W. J. Rendell manufactured the first birth control suppository. It contained a cocoa butter shell for suppositories that melted in the body to release the medication quinine, a drug ...