Behold the Manifold, the Concept that Changed How Mathematicians View Space

In the mid-19th century, Bernhard Riemann conceived of a new way to think about mathematical spaces, providing the foundation ...
NPR

What was 'Operation Allies Welcome,' which allowed some Afghans entry into the U.S.?

Rahmanullah Lakanwal, an Afghan man suspected of shooting two National Guard members in Washington, D.C., on Wednesday, was in the U.S. after entering the country in 2021 under a program called ...