Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Dermatologists share their expert advice on the frequency of bathing, plus a few habits worth stealing for healthier skin.

Penguins may not be relationship experts, but some of their habits are surprisingly healthier than the way many humans treat ...

Many insist that humans do need purpose because purpose provides achievement, belonging, clarity, coherence, direction, discipline, engagement, focus, fulfillment ...

Instead, the reality of love is that two people can arrive at the same destination through different routes, at different ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. The hiccups you’ve been cursing since lunch are older than you could ever possibly imagine — ...

A hantavirus outbreak on a cruise ship in the Atlantic Ocean has raised questions about how the rare, often fatal illness could have spread among passengers and crew, and whether it may continue to ...

We feel it every once in a while: a lump in our throat, a burning in our eyes, and then warm tears welling up in them. Whether it’s joy, grief, awe, or something undefinable, the experience is ...

Spoiler alert: probably more often than you think. Change and wash your bed sheets weekly—or at least every two weeks—to keep buildup of sweat, skin cells, and allergens at bay. Pillowcases need more ...

I’m a 32-year-old genderfluid person trying to navigate dating, kink, and weird feelings. My spouse and I are ...

Once you’ve seen a photo of Shere Hite, it’s hard to forget how beautiful this late twentieth-century self-trained feminist ...