Katia Riddle is a correspondent on NPR's science desk. Prior to her current role, she covered public health including reproductive rights and homelessness. She won a 2024 Gracie Award for a series on ...

In the late 1960s and early 1970s, the American cartoonist Crockett Johnson created a series of paintings on mathematical subjects. They’re based on theorems, laws, and mathematical figures, but ...