From ketchup to quicksand, non-Newtonian fluids have long fascinated and puzzled scientists. Unlike ordinary fluids, their ...

We're celebrating 25 years of work to advance a bold vision for a just and inclusive democracy and economy that reflects a growing and diversifying nation. Read Taifa Smith Butler's reflection on ...

November 24, 2025 • Our annual reading guide returns with 380+ new titles handpicked by NPR staff and trusted critics. Find 13 years of recommendations all in one place — that's more than 4,000 great ...