Monday is Columbus Day. On Columbus Day, I used to tell my students about the discovery of America. Everyone knows the story, of course – how Christopher Columbus sailed the Nina, Pinta, and Santa Maria in 1492 in search of a shorter route to the Indies. Columbus kept a log during his voyage. He reported that when the wind was strong, his ships made a lot of progress. When it wasn’t, they made very little. As the weeks went on, the crews grew restless. Storms brought trouble. Supplies became limited. Some of the food went bad.