* Author, The Riddle of the Compass: The Invention that Changed the World (Harcourt, 2001)
* Professor, Mathematics
* Bentley College
* Waltham, Massachusetts
* Assistant Professor of Psychiatry
* Harvard Medical School
* Boston, Massachusetts
In ancient times, sailors navigated the open seas guided by the stars, sun, winds, currents, and even migrating birds. The modern compass changed all that. In this hour, we'll talk with mathematician and author Amir Aczel about the invention of the compass and how it revolutionized navigation. Plus, how power naps aid learning.