Biological sex is usually described in simple binary terms: male or female. This works well for germ cells (sperm versus eggs ...

Our understanding of female–male power relationships in animals has changed over time. Evolutionary biologists once thought ...

The FIND function allows you to find a text string within another. It returns the position at which a character or string begins within another text string. The output of the above function will be 5, ...

Japan’s Prince Hisahito is the first male royal to reach adulthood in 40 years. Many people in Japan worry he could be the last.The elaborate palace rituals to formally recognize Hisahito as an adult ...

When a man finds out he has cancer, sex doesn’t tend to be the first thing on his mind. Survival is. But that’s not to say that the impact of a cancer diagnosis on sex, and more particularly on his ...

One iguana is putting a new spin on the concept of independence. Exotic Zoo Wildlife Park in Telford, England, shared that one of their casque-head iguanas has achieved a once-in-a-lifetime feat: ...

In mice, for example, the kidneys and liver show large sex-specific differences, whereas in humans, adipose (fat) tissue has ...

Estrogen-based hormone therapy can cause a person to experience physical, emotional, sexual, and reproductive changes. Some changes can reach their full extent within 2 to 3 years, while others can ...