A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

When President Donald Trump signed an executive order preventing trans girls and women from competing in women’s sports, I wrote a post on Facebook which I thought was fairly simple and ...

This week, follow the journeys of two lunar landers, meet “woolly mice,” see the oldest known bone tools, and more.

Sex is real, and it matters. In sport, this elemental truth cannot be affirmed loudly enough. It is impossible to mount any ...

The Senate has blocked the Republican-led effort to pass a federal ban on the participation of trans athletes in women’s ...

The sequence contained a promising new genetic tool for modifying DNA, a CRISPR. Editas Medicine, a Massachusetts-based ...

Science is interwoven into our daily lives. Physics governs our movement, chemistry powers the world with substances, and biology explains body functions and the natural world.

A growing number of new studies have found that, at least for some cells, death isn’t the end, but the beginning of something ...

Schnelting said the definition would “update” the Missouri Human Rights Act and protect school districts from legal ...

The HHS published guidance that narrowly defined sex and denied the existence of people who identify as transgender, intersex ...

Follow President Donald Trump's executive order, the Department of Health and Human Services issued new guidance that recognizes only two sexes.

From the column: "We now know that the chromosomes can combine in different ways and that gender identification is more than ...