The cover image on Mary Catherine Starr’s new book says it all: A mother sits on the toilet, head in her hands, as her two ...

Marine biologist Fernando Trujillo has spent a lifetime working with the endangered creatures, which offer a window into the ...

Promising results from an early-stage trial suggest that lenacapavir injections might offer long-lasting protection. What will really matter in the long run? That’s the question we tackle each ...