The series "Food for Thought" will explore an eclectic array of topics around food.  Delve into the earliest days of human ancestors to discover how food shaped the evolution of homo sapiens and how methods of food-gathering designed human civilization. Survey the staple crops that feed the world today, both grains and tubers. Visit familiar foods, apples and oranges, and be amazed at their diversity and history. Enjoy the sometime serious, sometime playful topics of teas, nuts and chocolate. Study the Columbian Exchange, when food became global, to appreciate how crops from the old world and the new impacted history as well as hunger.