A Guardian investigation into the U.S. overdose slowdown found that national declines masked sharp local disparities. Here's how the reporting team got the story.

Navigating the system to avoid tariffs on smaller orders is just too time-consuming or difficult for many entrepreneurs ...

Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...

Examine the MCA 2026 syllabus: a thorough overview of the essential subjects, broken down by semester, and highlighting ...

Large language models struggle to solve research-level math questions. It takes a human to assess just how poorly they perform. By Siobhan Roberts A few weeks ago, a high school student emailed Martin ...