Several years back, most Americans probably hadn't heard of berries like Goji, Acai, or Elderberries. But thanks to a robust berry industry and some good press about antioxidant properties, Americans are buying berries at a record pace. 

For more on how berries made it from the muffin sidelines to the produce limelight is Adam Leith Gollner, author of "The Fruit Hunters: A Story of Nature, Adventure, Commerce and Obsession."