0 to 9 : The Secret History of Numbers S01 E02 The Triumph of Mathematics

Why do we speak of "Arabic numerals" in Europe, even though they were "invented" in India? How did these ten little symbols begin their triumphant journey around the world from there? Why did zero change the course of history? The second episode follows the trail of Brahmins visiting Baghdad, Arab scientists, and traders in the Sahara.