A surprising finding from researchers in Japan has shown how an environmental factor can influence the development of sex organs in unborn mice. The discovery challenges the longstanding belief that ...

Imagine a future where a diagnosis of untreatable male infertility is no longer the end of the road—because science has found ...

Asked to define the word “woman” during her Supreme Court confirmation hearings last year, Ketanji Brown Jackson demurred, saying “I’m not a biologist.” I am a biologist, and I’m here ...

an evolutionary biologist at Kansas State University in Manhattan. Yet a definition of biological sex put forth by U.S. President Donald Trump designates people as either male or female based ...

For the first time in Florida, a bobcat has been recorded killing and eating a massive 13-foot Burmese python in the ...

The use of two sex categories to talk about a species is standard in biology. In many animal species, including people, however, there are individuals who are neither male nor female or who are ...

You might remember learning in high school biology that all the genetic information ... or an XY pair (assigned male). But there are more possible chromosomal variations than just those two ...

After a spell, a senior male lifts his head and turns from the ... a research associate at Stanford University's Center for Conservation Biology. "These calls show us that there's much more ...

Male and female should instead be referred to as “sperm-producing” and “egg-producing,” the Ecology and Evolutionary Biology (EEB) Language Project said, according to the Times of London.

“A fundamental tenant of biology is that definitions shift with ... “There are only two genders: Male and female. I look forward to finally putting my signature on the What is a Woman bill ...

Angela Saini knows what it’s like to be the only woman in the room, especially when that room is a science lab. In college, she was the only female in her engineering class. Before that, she’d ...

"Sex really is binary. You’re either male or female, and it’s absolutely clear you can do it on gamete size. You can do it on chromosomes. To me, as a biologist, it’s distinctly weird people ...