Al-Khwarizmi Does the Math

Quick:  multiply DVII by XVIII.  Before you could work the problem you translated it into Arabic numbers didn’t you? The person you can thank, or blame, for your ability to multiply and divide is the mathematician and astronomer Muhammad ibn Musa al-Khwarizmi (ca. 783-847), whose name lives on in a mangled form as “algorithm.  (Honest. …

Read More

The Other First Thanksgiving

Unless you live in the American Southwest, the grade school version of American history* typically leaps from Columbus and 1492 straight to 1620, when the Pilgrims landed in Massachusetts.  There is a vague awareness that the Spanish and the French were “out there” doing something, but the story focuses on the development of the thirteen…

Read More

The Great Sea

As so often happens when I pick up a history book, I was recently whacked over the head by a factoid that was both obvious and illuminating: the name Mediterranean literally means “the sea between the lands”. It’s a good name, but it’s by no means the only name that sea has gone by. The…

Read More