Maps are ubiquitous—on phones, in-flight and car displays, and in textbooks the world over. While some maps delineate and ...

Now, researchers have found the first evidence of changes taking place over the past 20 years in the shape of the inner core. Signs of the core’s deformation appeared in waves from earthquakes ...

Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...

November 25, 2024 • Books We Love returns with 350+ new titles handpicked by NPR staff and trusted critics. Find 12 years of recommendations all in one place — that's nearly 4,000 great reads.