Not only is this extraordinary spider an entirely new species previously unknown to science, but it is half male and half ...

The International Olympic Committee is inching toward a widespread ban on allowing trans-identifying men to compete against women in all female sporting events. A final announcement is expected early ...

Differences between men and women in intelligence and behaviour have been proposed and disputed for decades. Now, a growing body of scientific evidence shows hundreds of genes act differently in the ...

Men are from Mars, and women are from Venus—or so the saying goes. While this may be a generalization, there’s no doubting ...

Activists quietly shifting the goalposts on sex-and-gender discussion to escape the fact that they're losing the biology of ...

Another finding the researchers report from their experiments is that microplastics triggered harmful gene activity in both mouse and human endothelial cells. Exposure to microplastics was found to ...

Doctors discovered a woman had "blood chimerism" after examining the chromosomes of cells from different parts of her body.

Roshaante Anderson found out he was intersex when he was 11 years old and began living as a boy a couple of years later.

If you've ever seen a litter of kittens, you may know that many of them barely look related. With coats ranging from black to ...

Women have risk factors such as genetics, hormones, and sex-specific responses to stress.

One of the fundamental rules of inheritance states that different alleles (gene copies) of a trait, such as sex, are ...