The following is adapted from the introduction to “The Riddler: Fantastic Puzzles from FiveThirtyEight,” published by W. W. Norton & Co. It is in stores today! The world’s oldest collection of math ...

This story is part of WTOP’s continuing coverage of people making a difference in our community, reported by Stephanie Gaines-Bryant. Read more here. Some of the same items the Mayans would have used ...

Introduction: A new vision for math and science / Paul Boyer -- Indigenous taxonomy, ethnobotany, and sacred names / Michael Wassegijig Price -- It is not necessary for eagles to be crows: integrating ...