We're taught that chromosomes define biological sex: xx = female, and xy = male. However, it's not quite that straightforward ...

The rapid growth (and partial retreat) of “they” and “them” has gotten a lot of attention in recent years, but English is ...

More dads will soon be paid to spend months at home with their new babies – but the state government is under pressure to ...

Polyamory and non-monogamy experts say people in these relationships grieve the same as those with monogamous partners.

Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many. But testing ...

The urethra is a tube that allows urine to leave the body. Usually, people have just one urethra. "I have found out at the ...

A fossil jaw of a distant human relative was discovered much farther north than previously thought possible, revealing new ...

When two defective gene variants combine, normal protein function can sometimes be restored.

A new study found that women in Finland who had a lot of kids—or none—aged faster than those with one or a few kids. But the ...

The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

In a paper published in Nature, a team led by University of Chicago paleoanthropologist Professor Zeresenay Alemseged reports ...

One year ago today, President Donald J. Trump returned to office with a resounding mandate to restore prosperity, secure the ...