Sexual behavior is one reason why female mammals typically live longer than their male counterparts, according to a new study ...

Women usually live longer than men, and animals show the same pattern. Evolution, genes, and parenting explain why.

The coronavirus disease 2019 (COVID-19) outbreak caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was declared to be a global pandemic by the World Health Organization (WHO) on ...

Our understanding of female–male power relationships in animals has changed over time. Evolutionary biologists once thought that male mammals held clear-cut power over females. Later, species with ...

It’s not just about chromosomes. Or reproductive cells. Or any other binary metric. Many genetic, environmental and developmental variations can produce what are thought of as masculine and feminine ...

In mosquitofish, of the genus Gambusia, male fish are smaller than females -- sometimes only half the size. Biologists had previously assumed that smaller male mosquitofish had at least some ...

A Vermont elementary school is reportedly removing "male" and "female" language from its fifth grade science lessons covering the human body, puberty and reproduction. In a letter sent home to parents ...

EDITOR’S NOTE: Starre Vartan is the author of “The Stronger Sex: What Science Tells Us About the Power of the Female Body,” which will be published on July 15. People who lived through the Irish ...

MONTGOMERY, Ala. (AP) — Alabama lawmakers are advancing legislation that would strictly define who is considered female and male based on their reproductive systems. Opponents said the move could ...

A Vermont elementary school says it will no longer use the words “male” or “female” when teaching fifth-grade students about puberty and human reproductive systems. Families of students at Founders ...